Add support for token-based authentication.

As example getters for wifi connection (boolean) and wifi SSID (string) were
added.

Makefile

@@ -0,0 +1,45 @@
+
+ROUND_ICONS=app/src/main/res/mipmap-mdpi/ic_launcher_round.png \
+            app/src/main/res/mipmap-hdpi/ic_launcher_round.png \
+            app/src/main/res/mipmap-xhdpi/ic_launcher_round.png \
+            app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png
+	
+RECT_ICONS=app/src/main/res/mipmap-mdpi/ic_launcher.png \
+           app/src/main/res/mipmap-hdpi/ic_launcher.png \
+           app/src/main/res/mipmap-xhdpi/ic_launcher.png \
+           app/src/main/res/mipmap-xxhdpi/ic_launcher.png
+	
+ICONS=$(ROUND_ICONS) $(RECT_ICONS)
+RECT_BASE=app/src/main/res/mipmap-xxxhdpi/ic_launcher.png 
+ROUND_BASE=app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png
+BASE_ICONS=$(RECT_BASE) $(ROUND_BASE)
+
+.PHONY: all
+
+all: $(ICONS)
+
+app/src/main/res/mipmap-mdpi/ic_launcher_round.png: $(ROUND_BASE)
+	convert $< -resize 48x48 $@
+
+app/src/main/res/mipmap-hdpi/ic_launcher_round.png: $(ROUND_BASE)
+	convert $< -resize 72x72 $@
+	
+app/src/main/res/mipmap-xhdpi/ic_launcher_round.png: $(ROUND_BASE)
+	convert $< -resize 96x96 $@
+	
+app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png: $(ROUND_BASE)
+	convert $< -resize 144x144 $@
+	
+app/src/main/res/mipmap-mdpi/ic_launcher.png: $(RECT_BASE)
+	convert $< -resize 48x48 $@
+
+app/src/main/res/mipmap-hdpi/ic_launcher.png: $(RECT_BASE)
+	convert $< -resize 72x72 $@
+	
+app/src/main/res/mipmap-xhdpi/ic_launcher.png: $(RECT_BASE)
+	convert $< -resize 96x96 $@
+	
+app/src/main/res/mipmap-xxhdpi/ic_launcher.png: $(RECT_BASE)
+	convert $< -resize 144x144 $@
+	
+

app/build.gradle

@@ -1,15 +1,17 @@
 apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android-extensions'
+apply plugin: 'kotlin-android'
 
 android {
-    compileSdkVersion 25
-    buildToolsVersion "27.0.1"
+    compileSdkVersion 29
+    buildToolsVersion '29.0.2'
     defaultConfig {
         applicationId "com.codigoparallevar.minicards"
         minSdkVersion 15
-        targetSdkVersion 25
+        targetSdkVersion 29
         versionCode 1
         versionName "1.0"
-        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
     buildTypes {
         release {
@@ -17,18 +19,31 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
+    compileOptions {
+        sourceCompatibility = 1.8
+        targetCompatibility = 1.8
+    }
 }
 
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
-    androidTestImplementation('com.android.support.test.espresso:espresso-core:2.2.2', {
+    implementation 'androidx.annotation:annotation:1.0.0'
+    implementation 'androidx.lifecycle:lifecycle-extensions:2.0.0'
+    androidTestImplementation('androidx.test.espresso:espresso-core:3.1.0', {
         exclude group: 'com.android.support', module: 'support-annotations'
     })
-    implementation 'com.android.support:appcompat-v7:25.4.0'
+    implementation 'androidx.appcompat:appcompat:1.0.0'
     testImplementation 'junit:junit:4.12'
-    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
-    implementation 'com.android.support:design:25.4.0'
-    compile 'com.getbase:floatingactionbutton:1.10.1'
-    compile 'com.larswerkman:HoloColorPicker:1.5'
-    implementation 'com.android.support:cardview-v7:25.4.0'
+    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+    implementation 'com.google.android.material:material:1.0.0'
+    implementation 'com.getbase:floatingactionbutton:1.10.1'
+    implementation 'com.larswerkman:HoloColorPicker:1.5'
+    implementation 'androidx.cardview:cardview:1.0.0'
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+    implementation 'com.google.code.gson:gson:2.8.6'
+
+    implementation group: 'com.squareup.okhttp3', name: 'okhttp', version: '4.7.2'
+}
+repositories {
+    mavenCentral()
 }

app/src/androidTest/java/com/codigoparallevar/minicards/ExampleInstrumentedTest.java

@@ -1,8 +1,8 @@
 package com.codigoparallevar.minicards;
 
 import android.content.Context;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.platform.app.InstrumentationRegistry;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;

app/src/main/AndroidManifest.xml

@@ -2,11 +2,25 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.codigoparallevar.minicards">
 
-    <!-- OpenGL ES 2.0 -->
+    <uses-permission android:name="android.permission.INTERNET" />
+    <!-- Network state on programaker bridge -->
+    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" android:required="false" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" android:required="false" />
+    <!-- For Wifi SSID -->
+    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" android:required="false" />
+    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" android:required="false" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" android:required="false" />
+    <!-- For vibration block on bridge -->
+    <uses-permission android:name="android.permission.VIBRATE" android:required="false" />
+    <!-- For Camera block -->
+    <uses-permission android:name="android.permission.CAMERA" android:required="false" />
 
+    <!-- OpenGL ES 2.0 -->
     <uses-feature
         android:glEsVersion="0x00020000"
         android:required="true" />
+    <uses-feature android:name="android.hardware.camera" />
+    <uses-feature android:name="android.hardware.camera.autofocus" />
 
     <application
         android:allowBackup="true"
@@ -15,9 +29,15 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
+        <service
+            android:name=".bridge.ProgramakerBridgeService"
+            android:enabled="true"
+            android:exported="true" />
+
         <activity android:name=".CardActivity">
             <intent-filter>
                 <action android:name="com.codigoparallevar.minicards.CARD" />
+
                 <category android:name="android.intent.category.DEFAULT" />
             </intent-filter>
         </activity>
@@ -26,10 +46,12 @@
             android:theme="@style/AppTheme.NoActionBar">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
+
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
             <intent-filter>
                 <action android:name="com.codigoparallevar.minicards.DECK" />
+
                 <category android:name="android.intent.category.DEFAULT" />
             </intent-filter>
         </activity>

app/src/main/java/com/codigoparallevar/minicards/CanvasView.java

@@ -4,27 +4,33 @@ import android.content.Context;
 import android.graphics.Canvas;
 import android.graphics.Color;
 import android.graphics.Paint;
-import android.support.annotation.NonNull;
-import android.support.annotation.Nullable;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.view.MotionEvent;
 import android.view.View;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
 import com.codigoparallevar.minicards.motion.MotionMode;
+import com.codigoparallevar.minicards.parts.connectors.ProgramakerCustomBlockInputConnector;
 import com.codigoparallevar.minicards.types.Part;
 import com.codigoparallevar.minicards.types.PartConnection;
 import com.codigoparallevar.minicards.types.PartGrid;
 import com.codigoparallevar.minicards.types.Position;
 import com.codigoparallevar.minicards.types.Selectable;
-import com.codigoparallevar.minicards.types.Tuple2;
-import com.codigoparallevar.minicards.types.Tuple4;
+import com.codigoparallevar.minicards.types.connectors.Wiring.SignalWire;
+import com.codigoparallevar.minicards.types.connectors.Wiring.Wire;
 import com.codigoparallevar.minicards.types.connectors.input.AnyInputConnector;
 import com.codigoparallevar.minicards.types.connectors.input.BooleanInputConnector;
+import com.codigoparallevar.minicards.types.connectors.input.ImageInputConnector;
 import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
 import com.codigoparallevar.minicards.types.connectors.input.SignalInputConnector;
 import com.codigoparallevar.minicards.types.connectors.input.StringInputConnector;
 import com.codigoparallevar.minicards.types.connectors.output.OutputConnector;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+import com.codigoparallevar.minicards.types.functional.Tuple4;
+import com.programaker.api.ProgramakerApi;
 
 import java.io.IOException;
 import java.util.ArrayList;
@@ -32,7 +38,8 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
-class CanvasView extends View implements PartGrid {
+public class CanvasView extends View implements PartGrid {
+    private static final String LogTag = "Canvas view";
 
     @NonNull
     List<Part> parts = new ArrayList<>();
@@ -51,6 +58,7 @@ class CanvasView extends View implements PartGrid {
 
     @NonNull
     private String name = "default";
+    private ProgramakerApi api = null;
     private final static float touchTimeForLongTouchInMillis = 500;
     private boolean _isDragging = false;
     private CardActivity parentActivity = null;
@@ -63,6 +71,7 @@ class CanvasView extends View implements PartGrid {
     @Nullable
     private Tuple2<Integer, Integer> _mouseDownPoint = null;
     private int cardBackgroundColor;
+    private SignalListenerManager listenerManager = null;
 
     public CanvasView(Context context) {
         super(context);
@@ -88,7 +97,7 @@ class CanvasView extends View implements PartGrid {
         Map<String, Part> partsById = buildPartsById();
         for (PartConnection connection : connections){
             if (!partsById.containsKey(connection.inputPartId)){
-                Log.e("Canvas view", "Key '" + connection.inputPartId
+                Log.e(LogTag, "Key '" + connection.inputPartId
                         + "' not found on deserialization");
                 continue;
             }
@@ -97,14 +106,14 @@ class CanvasView extends View implements PartGrid {
             InputConnector inputConnector = inputPart.getConnectorWithId(connection.inputConnectorId);
 
             if (inputConnector == null){
-                Log.e("Canvas view", "Connector ID '" + connection.inputConnectorId
+                Log.e(LogTag, "Connector ID '" + connection.inputConnectorId
                         + "' not found on deserialization");
                 continue;
             }
 
             OutputConnector outputConnector = connection.outputConnector;
             if (inputConnector == null){
-                Log.e("Canvas view", "Connector not found on connection");
+                Log.e(LogTag, "Connector not found on connection");
                 continue;
             }
 
@@ -116,7 +125,7 @@ class CanvasView extends View implements PartGrid {
                 outputConnector.connectTo(inputConnector);
             }
             catch (ClassCastException e) {
-                Log.e("Minicards - Canvas view", "Malformed connection", e);
+                Log.e(LogTag, "Malformed connection", e);
             }
         }
     }
@@ -125,7 +134,7 @@ class CanvasView extends View implements PartGrid {
         Map<String, Part> partsById = new HashMap<>(parts.size());
         for (Part part : parts) {
             partsById.put(part.get_id(), part);
-            Log.w("CanvasView", "Added part ID: " + part.get_id() + " - " + part);
+            Log.w(LogTag, "Added part ID: " + part.get_id() + " - " + part);
         }
 
         return partsById;
@@ -142,7 +151,7 @@ class CanvasView extends View implements PartGrid {
             part.draw(scrolledCanvas, _devMode);
         }
 
-        Log.d("Render time", System.currentTimeMillis() - renderStartTime + "ms");
+        Log.v(LogTag, "Render time: " + (System.currentTimeMillis() - renderStartTime) + "ms");
     }
 
     private void drawBackground(ScrolledCanvas canvas) {
@@ -177,7 +186,15 @@ class CanvasView extends View implements PartGrid {
         final int xInCanvas = xInScreen + _viewOrigin.item1;
         final int yInCanvas = yInScreen + _viewOrigin.item2;
 
-        switch (event.getAction()){
+        int action = event.getAction();
+        if ((action == MotionEvent.ACTION_MOVE)
+                && _devMode
+                && (selectedPart instanceof Wire)) {
+            // Wires cannot be moved, so go into "move canvas" mode
+            selectedPart = null;
+        }
+
+        switch (action){
             case MotionEvent.ACTION_DOWN:
             {
                 _mouseDownPoint = new Tuple2<>(xInScreen, yInScreen);
@@ -186,11 +203,10 @@ class CanvasView extends View implements PartGrid {
                 lastTouchedPosition.to(xInScreen, yInScreen);
                 lastTouchedTime = System.currentTimeMillis();
                 if (selectedPart == null) {
-                    Log.d("Touched part", "not found");
+                    Log.d(LogTag, "Touched part not found");
                     return false;
                 }
-
-                Log.d("Touched part", "Part: " + selectedPart);
+                Log.d(LogTag, "Touched part FOUND. Part: " + selectedPart);
             }
             break;
 
@@ -204,14 +220,28 @@ class CanvasView extends View implements PartGrid {
                         if (selectedPart instanceof Part){
                             ((Part) selectedPart).touched();
                         }
+                        else if (selectedPart instanceof Wire) {
+                            // TODO: No drag or long-touch, just show the "cut" option
+                            Log.d(LogTag, "Touched Wire");
+                            Wire selectedWire = (Wire) selectedPart;
+                            selectedPart = null;
+
+                            selectedWire.unlink();
+                        }
+                        else if (selectedPart instanceof ProgramakerCustomBlockInputConnector) {
+                            ((ProgramakerCustomBlockInputConnector) selectedPart).touched();
+                        }
                     }
                 }
                 else if (motionMode == MotionMode.Type.LongTouch && _devMode) {
+                    if (selectedPart instanceof Wire) {
+                        // Wires cannot be moved, so go into the
+                    }
                     if (selectedPart != null) {
                         selectedPart.getMoveable().drop(xInCanvas, yInCanvas);
 
                         if (inDropZone(xInScreen, yInScreen)) {
-                            Log.d("Canvas", "Deleting element" + selectedPart);
+                            Log.d(LogTag, "Deleting element" + selectedPart);
                             parts.remove(selectedPart);
                             selectedPart.unlink();
                         }
@@ -226,7 +256,7 @@ class CanvasView extends View implements PartGrid {
             try {
                 saveState();
             } catch (IOException e) {
-                Log.w("PartCanvasView", e.getMessage());
+                Log.w(LogTag, e.getMessage());
             }
             break;
 
@@ -236,6 +266,7 @@ class CanvasView extends View implements PartGrid {
                     break;
                 }
 
+                // Log.v(LogTag, "Moving part="+selectedPart);
                 if (selectedPart == null){
                     int xMovement = _mouseDownPoint.item1 - xInScreen;
                     int yMovement = _mouseDownPoint.item2 - yInScreen;
@@ -246,7 +277,7 @@ class CanvasView extends View implements PartGrid {
                     _mouseDownPoint = new Tuple2(xInScreen, yInScreen);
                 }
                 else {
-                    Log.i("Canvas", "X: " + xInScreen + " Y: " + yInScreen
+                    Log.d(LogTag, "X: " + xInScreen + " Y: " + yInScreen
                             + " in drop zone " + _dropToRemoveZone + " : "
                             + inDropZone(xInScreen, yInScreen));
 
@@ -268,7 +299,7 @@ class CanvasView extends View implements PartGrid {
 
             default:
             {
-                Log.d("PartCanvasView", "Unhandled action: " + event.getAction());
+                Log.d(LogTag, "Unhandled action: " + event.getAction());
             }
         }
 
@@ -323,15 +354,42 @@ class CanvasView extends View implements PartGrid {
         for (int i = parts.size() - 1; i >= 0; i--){
             final Part part = parts.get(i);
             // First try with output connectors
-            for (OutputConnector outputConnector :  part.getOutputConnectors()){
-                if (outputConnector.containsPoint(x, y)){
-                    return outputConnector;
+            List<OutputConnector> outputConnectors = part.getOutputConnectors();
+            if (outputConnectors != null) {
+                for (OutputConnector outputConnector : outputConnectors) {
+                    if (outputConnector.containsPoint(x, y)) {
+                        return outputConnector;
+                    }
                 }
             }
+
             // Then with input ones
-            for (InputConnector inputConnector :  part.getInputConnectors()){
-                if (inputConnector.containsPoint(x, y)){
-                    return inputConnector;
+            List<InputConnector> inputConnectors = part.getInputConnectors();
+            if (inputConnectors != null) {
+                for (InputConnector inputConnector : inputConnectors) {
+                    if (inputConnector.containsPoint(x, y)) {
+                        return inputConnector;
+                    }
+                }
+            }
+        }
+
+        // Finally, try with the wires
+        for (int i = parts.size() - 1; i >= 0; i--) {
+            final Part part = parts.get(i);
+            List<OutputConnector> outputConnectors = part.getOutputConnectors();
+            if (outputConnectors != null) {
+                for (OutputConnector outputConnector : outputConnectors) {
+                    List<SignalWire> wires = outputConnector.getWires();
+                    if (wires == null) {
+                        continue;
+                    }
+                    for (Wire wire : wires) {
+                        if (wire.containsPoint(x, y)) {
+                            Log.d(LogTag, "Point in wire " + wire);
+                            return wire;
+                        }
+                    }
                 }
             }
         }
@@ -339,6 +397,23 @@ class CanvasView extends View implements PartGrid {
         return null;
     }
 
+    @Override
+    public ProgramakerApi getApi() {
+        if (api == null) {
+            api = new ProgramakerApi();
+            api.setToken(new ConfigManager(this.getContext()).getToken());
+        }
+        return api;
+    }
+
+    @Override
+    public SignalListenerManager getListenerManager() {
+        if (listenerManager == null) {
+            listenerManager = new SignalListenerManager(getApi());
+        }
+        return listenerManager;
+    }
+
     @Override
     @Nullable
     public SignalInputConnector getSignalInputConnectorOn(int x, int y) {
@@ -371,11 +446,9 @@ class CanvasView extends View implements PartGrid {
     @Override
     @Nullable
     public BooleanInputConnector getBooleanInputConnectorOn(int x, int y) {
-        // If no part was found, do the same for connectors
         for (int i = parts.size() - 1; i >= 0; i--){
             final Part part = parts.get(i);
 
-            // Then with input ones
             for (InputConnector inputConnector :  part.getInputConnectors()){
                 BooleanInputConnector booleanInputConnector;
                 if (inputConnector instanceof BooleanInputConnector){
@@ -397,6 +470,25 @@ class CanvasView extends View implements PartGrid {
         return null;
     }
 
+    @Override
+    public AnyInputConnector getAnyInputConnectorOn(int x, int y) {
+        for (int i = parts.size() - 1; i >= 0; i--){
+            final Part part = parts.get(i);
+
+            for (InputConnector inputConnector :  part.getInputConnectors()){
+                if (!(inputConnector instanceof AnyInputConnector)) {
+                    continue;
+                }
+
+                if (inputConnector.containsPoint(x, y)){
+                    return (AnyInputConnector) inputConnector;
+                }
+            }
+        }
+
+        return null;
+    }
+
     @Override
     @Nullable
     public StringInputConnector getStringInputConnectorOn(int x, int y) {
@@ -426,6 +518,31 @@ class CanvasView extends View implements PartGrid {
         return null;
     }
 
+    @Override
+    public ImageInputConnector getImageInputConnectorOn(int x, int y) {
+        // If no part was found, do the same for connectors
+        for (int i = parts.size() - 1; i >= 0; i--){
+            final Part part = parts.get(i);
+
+            // Then with input ones
+            for (InputConnector inputConnector :  part.getInputConnectors()){
+                ImageInputConnector imageInputConnector;
+                if (inputConnector instanceof ImageInputConnector){
+                    imageInputConnector = (ImageInputConnector) inputConnector;
+                }
+                else {
+                    continue;
+                }
+
+                if (imageInputConnector.containsPoint(x, y)){
+                    return imageInputConnector;
+                }
+            }
+        }
+
+        return null;
+    }
+
 
     public void addPart(Part part) {
         parts.add(part);
@@ -465,11 +582,8 @@ class CanvasView extends View implements PartGrid {
 
     @Override
     public void update() {
-        parentActivity.runOnUiThread(new Runnable() {
-            @Override
-            public void run() {
-                CanvasView.this.invalidate();
-            }
+        parentActivity.runOnUiThread(() -> {
+            CanvasView.this.invalidate();
         });
     }
 
@@ -490,7 +604,11 @@ class CanvasView extends View implements PartGrid {
 
     public void pause() {
         for (Part part : parts) {
-            part.resume();
+            part.pause();
         }
     }
+
+    public void requestPermission(String permission, Runnable ifAccepted) {
+        this.parentActivity.requestPermissions(permission, ifAccepted);
+    }
 }

app/src/main/java/com/codigoparallevar/minicards/CardActivity.java

@@ -2,15 +2,32 @@ package com.codigoparallevar.minicards;
 
 import android.content.Context;
 import android.content.Intent;
-import android.support.design.widget.FloatingActionButton;
-import android.support.v7.app.ActionBar;
-import android.support.v7.app.AppCompatActivity;
+import android.content.pm.PackageManager;
+import android.os.AsyncTask;
+import android.os.Build;
 import android.os.Bundle;
 import android.util.Log;
 import android.view.MotionEvent;
 import android.view.View;
 
+import androidx.annotation.NonNull;
+import androidx.appcompat.app.ActionBar;
+import androidx.appcompat.app.AppCompatActivity;
+
+import com.codigoparallevar.minicards.toolbox.PartsHolder;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+import com.codigoparallevar.minicards.types.functional.Tuple3;
+import com.codigoparallevar.minicards.ui_helpers.GetAsync;
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
+import com.programaker.api.ProgramakerApi;
+import com.programaker.api.data.ProgramakerBridgeInfo;
+import com.programaker.api.data.api_results.ProgramakerBridgeCustomBlockResult;
+import com.programaker.api.data.api_results.ProgramakerGetCustomBlocksResult;
+
 import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
 
 public class CardActivity extends AppCompatActivity {
 
@@ -18,7 +35,10 @@ public class CardActivity extends AppCompatActivity {
     public static final String CARD_PATH_KEY = "CARD_PATH";
     public static final String VISUALIZATION_MODE_KEY = "VISUALIZATION_MODE";
     public static final String DEVELOPER_VISUALIZATION_MODE = "DEVELOPER_VISUALIZATION_MODE";
+    public static final String USER_VISUALIZATION_MODE = "USER_VISUALIZATION_MODE";
 
+    private int permissionRequestLatest = 1;
+    private Map<Integer, Runnable> permissionRequestCallbacks = new HashMap<>();
 
     CanvasView canvasView;
     com.getbase.floatingactionbutton.AddFloatingActionButton AddPartButton;
@@ -34,11 +54,35 @@ public class CardActivity extends AppCompatActivity {
     boolean devMode = false;
     FloatingActionButton removePartFab;
     private PartsHolder partsHolder;
+    private ProgramakerApi ProgramakerApi;
+    private ConfigManager Config;
+    private ProgramakerGetCustomBlocksResult CustomBlocks = null;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
+        this.Config = new ConfigManager(this);
+        this.ProgramakerApi = new ProgramakerApi();
+        String token = this.Config.getToken();
+        if (token != null) {
+            this.ProgramakerApi.setToken(token);
+        }
+
+        partsHolder = new PartsHolder(this);
+
+        new GetAsync<Tuple2<List<ProgramakerBridgeInfo>, List<ProgramakerBridgeCustomBlockResult>>>()
+                .executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR,
+                        new Tuple3<>(() ->
+                                new Tuple2<>(
+                                        CardActivity.this.ProgramakerApi.fetchConnectedBridges(),
+                                        CardActivity.this.ProgramakerApi.fetchCustomBlocks()),
+                                result -> {
+                                    partsHolder.addCustomBlocks(result.item1, result.item2);
+                                    Log.d("CARDActivity", "custom blocks: " + result.toString());
+                                },
+                                exception -> Log.e("CARDActivity", "error retrieving custom blocks: " + exception.toString())));
+
         // Hide action bar
         ActionBar actionBar = getSupportActionBar();
         if (actionBar != null) {
@@ -52,7 +96,6 @@ public class CardActivity extends AppCompatActivity {
         canvasView.setParentActivity(this);
 
         // Initialize auxiliary elements
-        partsHolder = new PartsHolder(this);
 
         removePartFab = (FloatingActionButton) findViewById(R.id.remove_part_fab);
         canvasView.setDropZone(
@@ -97,8 +140,7 @@ public class CardActivity extends AppCompatActivity {
         ShowDeckFromDevModeButton.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
-                Intent i = new Intent(DeckPreviewActivity.INTENT);
-                CardActivity.this.startActivity(i);
+                finish();
             }
         });
 
@@ -107,8 +149,7 @@ public class CardActivity extends AppCompatActivity {
         ShowDeckFromUserModeButton.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
-                Intent i = new Intent(DeckPreviewActivity.INTENT);
-                CardActivity.this.startActivity(i);
+                finish();
             }
         });
 
@@ -196,13 +237,11 @@ public class CardActivity extends AppCompatActivity {
             if (canvasView.isDragging()){
                 devFabMenu.setVisibility(View.GONE);
                 userFabMenu.setVisibility(View.GONE);
-                removePartFab.setVisibility(View.VISIBLE);
-                Log.d("Main", "Changing visibility!");
+                ((View)removePartFab).setVisibility(View.VISIBLE);
             }
             else {
                 this.setDevMode(devMode);
-                removePartFab.setVisibility(View.GONE);
-                Log.d("Main", "Now changing visibility!");
+                ((View)removePartFab).setVisibility(View.GONE);
             }
             canvasView.setDropZone(
                     removePartFab.getX(), removePartFab.getX() + removePartFab.getWidth(),
@@ -211,11 +250,54 @@ public class CardActivity extends AppCompatActivity {
     }
 
     public static void openCard(Context context, CardFile cardfile, String visualizationMode) {
+        openCardByPath(context, cardfile.getPath(), visualizationMode);
+    }
+
+    public static void openCard(Context context, PreviewCard cardfile, String visualizationMode) {
+        openCardByPath(context, cardfile.getPath(), visualizationMode);
+    }
+
+    private static void openCardByPath(Context context, String path, String visualizationMode) {
         Intent i = new Intent(INTENT);
-        i.putExtra(CARD_PATH_KEY, cardfile.getPath());
+        i.putExtra(CARD_PATH_KEY, path);
         if (visualizationMode != null) {
             i.putExtra(VISUALIZATION_MODE_KEY, visualizationMode);
         }
         context.startActivity(i);
     }
+
+    public void requestPermissions(String permission, Runnable ifAccepted) {
+        permissionRequestLatest++;
+        int request_code = permissionRequestLatest;
+        permissionRequestCallbacks.put(request_code, ifAccepted);
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            this.requestPermissions(new String[]{permission}, request_code);
+        }
+    }
+
+    @Override
+    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
+                                           @NonNull int[] grantResults) {
+        // If request is cancelled, the result arrays are empty.
+        if (grantResults.length > 0 &&
+                grantResults[0] == PackageManager.PERMISSION_GRANTED) {
+            // Permission is granted. Continue the action or workflow
+            // in your app.
+            if (permissionRequestCallbacks.containsKey(requestCode)) {
+                Runnable callback = permissionRequestCallbacks.get(requestCode);
+                permissionRequestCallbacks.remove(requestCode);
+                callback.run();
+            }
+        }  else {
+            // TODO:
+            // Explain to the user that the feature is unavailable because
+            // the features requires a permission that the user has denied.
+            // At the same time, respect the user's decision. Don't link to
+            // system settings in an effort to convince the user to change
+            // their decision.
+            if (permissionRequestCallbacks.containsKey(requestCode)) {
+                permissionRequestCallbacks.remove(requestCode);
+            }
+        }
+    }
 }

app/src/main/java/com/codigoparallevar/minicards/CardFile.java

@@ -4,19 +4,23 @@ import android.annotation.TargetApi;
 import android.content.Context;
 import android.graphics.Color;
 import android.os.Build;
-import android.support.annotation.NonNull;
 import android.util.Log;
 
+import androidx.annotation.NonNull;
+
+import com.codigoparallevar.minicards.parts.ProgramakerCustomBlockPart;
+import com.codigoparallevar.minicards.parts.android.CameraStreamer;
 import com.codigoparallevar.minicards.parts.buttons.RoundButton;
 import com.codigoparallevar.minicards.parts.logic.Ticker;
 import com.codigoparallevar.minicards.parts.logic.Toggle;
 import com.codigoparallevar.minicards.parts.samples.ColorBox;
-import com.codigoparallevar.minicards.parts.samples.Placeholder;
 import com.codigoparallevar.minicards.parts.strings.ConvertToString;
+import com.codigoparallevar.minicards.parts.values.StaticValuePart;
+import com.codigoparallevar.minicards.parts.viewers.ImageFrame;
 import com.codigoparallevar.minicards.types.Part;
 import com.codigoparallevar.minicards.types.PartConnection;
 import com.codigoparallevar.minicards.types.PartGrid;
-import com.codigoparallevar.minicards.types.Tuple2;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
 
 import org.json.JSONArray;
 import org.json.JSONException;
@@ -34,7 +38,7 @@ import java.util.UUID;
 
 public class CardFile {
 
-    static final int DEFAULT_BACKGROUND_COLOR = Color.parseColor("#044563");
+    static final int DEFAULT_BACKGROUND_COLOR = Color.parseColor("#4485A3");
     static final String PATH_SEPARATOR = "/";
     @NonNull
     private final String cardsDirectory;
@@ -237,7 +241,7 @@ public class CardFile {
                 card.addConnections(info.item2);
             }
         } catch (JSONException e) {
-            throw new ErrorLoadingCardException(ErrorLoadingCardException.Reason.UNKNOWN_FORMAT);
+                throw new ErrorLoadingCardException(ErrorLoadingCardException.Reason.UNKNOWN_FORMAT);
         }
 
         return card;
@@ -255,8 +259,8 @@ public class CardFile {
 
             return buttonInfo;
         }
-        else if (type.equals(Placeholder.class.getName())) {
-            return new Tuple2<>(Placeholder.deserialize(grid, jsonObject.getJSONObject("_data")),
+        else if (type.equals(ImageFrame.class.getName())) {
+            return new Tuple2<>(ImageFrame.deserialize(grid, jsonObject.getJSONObject("_data")),
                     Collections.<PartConnection>emptyList());
         }
         else if (type.equals(ColorBox.class.getName())){
@@ -284,6 +288,27 @@ public class CardFile {
 
             return convertToStringInfo;
         }
+        else if (type.equals(ProgramakerCustomBlockPart.class.getName())){
+            Tuple2<Part, List<PartConnection>> customBlockPartInfo = ProgramakerCustomBlockPart.deserialize(
+                    grid,
+                    jsonObject.getJSONObject("_data"));
+
+            return customBlockPartInfo;
+        }
+        else if (type.equals(StaticValuePart.class.getName())){
+            Tuple2<Part, List<PartConnection>> staticValuePartInfo = StaticValuePart.deserialize(
+                    grid,
+                    jsonObject.getJSONObject("_data"));
+
+            return staticValuePartInfo;
+        }
+        else if (type.equals(CameraStreamer.class.getName())){
+            Tuple2<Part, List<PartConnection>> staticValuePartInfo = CameraStreamer.deserialize(
+                    grid,
+                    jsonObject.getJSONObject("_data"));
+
+            return staticValuePartInfo;
+        }
         else {
             throw new JSONException("Expected known class, found " + type);
         }

app/src/main/java/com/codigoparallevar/minicards/CardPreviewArrayAdapter.java

@@ -4,9 +4,9 @@ import android.app.Dialog;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
-import android.support.annotation.NonNull;
-import android.support.v7.app.AlertDialog;
-import android.support.v7.widget.CardView;
+import androidx.annotation.NonNull;
+import androidx.appcompat.app.AlertDialog;
+import androidx.cardview.widget.CardView;
 import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -17,6 +17,8 @@ import android.widget.ImageView;
 import android.widget.TextView;
 import android.widget.Toast;
 
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
+
 import java.io.IOException;
 
 class CardPreviewArrayAdapter extends ArrayAdapter<PreviewCard> {
@@ -41,16 +43,18 @@ class CardPreviewArrayAdapter extends ArrayAdapter<PreviewCard> {
         final View row = inflater.inflate(R.layout.card_preview, parent, false);
         final PreviewCard card = this.cards[position];
 
-        row.setOnClickListener(new View.OnClickListener() {
+        TextView nameView = row.findViewById(R.id.card_preview_name);
+        final CardView cardView = row.findViewById(R.id.card_preview_card);
+        final FloatingActionButton settingsButton = row.findViewById(R.id.card_preview_settings_button);
+
+        cardView.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
-                Intent i = new Intent(CardActivity.INTENT);
-                i.putExtra(CardActivity.CARD_PATH_KEY, card.getPath());
-                CardPreviewArrayAdapter.this.getContext().startActivity(i);
+                CardActivity.openCard(getContext(), card, CardActivity.DEVELOPER_VISUALIZATION_MODE);
             }
         });
 
-        final ImageView settingsButton = (ImageView) row.findViewById(R.id.card_preview_settings_button);
+
         settingsButton.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
@@ -58,19 +62,8 @@ class CardPreviewArrayAdapter extends ArrayAdapter<PreviewCard> {
             }
         });
 
-        CardView cardView = (CardView) row.findViewById(R.id.card_preview_card);
-        TextView nameView = (TextView) row.findViewById(R.id.card_preview_name);
 
-        int backgroundColor = card.getColor();
-        cardView.setBackgroundColor(backgroundColor);
         nameView.setText(card.getName());
-        if (backgroundColor == CardFile.DEFAULT_BACKGROUND_COLOR){
-            nameView.setTextColor(0xFFF0F0F0);
-        }
-        else {
-            nameView.setTextColor(0xFFFFFF ^ backgroundColor);
-        }
-
         return row;
     }
 
@@ -80,7 +73,7 @@ class CardPreviewArrayAdapter extends ArrayAdapter<PreviewCard> {
         final View openCardOptions = (LayoutInflater.from(getContext())
                 .inflate(R.layout.card_settings_dialog, null));
 
-        final EditText cardNameEditText = (EditText) openCardOptions.findViewById(R.id.card_setting_name_edit_text);
+        final EditText cardNameEditText = openCardOptions.findViewById(R.id.card_setting_name_edit_text);
         cardNameEditText.setText(card.getName());
 
         builder.setTitle("Card settings")
@@ -115,7 +108,7 @@ class CardPreviewArrayAdapter extends ArrayAdapter<PreviewCard> {
 
         final Dialog dialog = builder.create();
 
-        final TextView deleteCardLink = (TextView) openCardOptions.findViewById(R.id.card_setting_delete_card);
+        final TextView deleteCardLink = openCardOptions.findViewById(R.id.card_setting_delete_card);
         deleteCardLink.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {

app/src/main/java/com/codigoparallevar/minicards/ConfigManager.java

@@ -0,0 +1,80 @@
+package com.codigoparallevar.minicards;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+
+import static android.content.Context.MODE_PRIVATE;
+
+public class ConfigManager {
+    private final Context context;
+    private static final String PREFERENCES_NAME = "MINICARDS_PREFERENCES";
+    private static final String TOKEN_KEY = "PROGRAMAKER_API_TOKEN";
+    private static final String BRIDGE_ID_KEY = "PROGRAMAKER_BRIDGE_ID";
+    private static final String BRIDGE_AUTHENTICATION_TOKEN_KEY = "BRIDGE_AUTHENTICATION_TOKEN";
+    private static final String BRIDGE_CONNECTION_ID_KEY = "PROGRAMAKER_BRIDGE_CONNECTION_ID";
+
+    public ConfigManager(Context ctx) {
+        this.context = ctx;
+    }
+
+    public void setToken(String token) {
+        SharedPreferences preferences = this.context.getSharedPreferences(PREFERENCES_NAME, MODE_PRIVATE);
+        SharedPreferences.Editor edit = preferences.edit();
+
+        edit.putString(TOKEN_KEY, token);
+        edit.apply();
+    }
+
+    public String getToken() {
+        SharedPreferences preferences = this.context.getSharedPreferences(PREFERENCES_NAME, MODE_PRIVATE);
+        return preferences.getString(TOKEN_KEY, null);
+    }
+
+    public void removeBridgeId() {
+        SharedPreferences preferences = this.context.getSharedPreferences(PREFERENCES_NAME, MODE_PRIVATE);
+        SharedPreferences.Editor edit = preferences.edit();
+
+        if (preferences.contains(BRIDGE_ID_KEY)) {
+            edit.remove(BRIDGE_ID_KEY).apply();
+        }
+    }
+
+    public void setBridgeId(String bridgeId) {
+        SharedPreferences preferences = this.context.getSharedPreferences(PREFERENCES_NAME, MODE_PRIVATE);
+        SharedPreferences.Editor edit = preferences.edit();
+
+        edit.putString(BRIDGE_ID_KEY, bridgeId);
+        edit.commit();
+    }
+
+    public String getBridgeId() {
+        SharedPreferences preferences = this.context.getSharedPreferences(PREFERENCES_NAME, MODE_PRIVATE);
+        return preferences.getString(BRIDGE_ID_KEY, null);
+    }
+
+    public void setBridgeConnectionId(String connectionId) {
+        SharedPreferences preferences = this.context.getSharedPreferences(PREFERENCES_NAME, MODE_PRIVATE);
+        SharedPreferences.Editor edit = preferences.edit();
+
+        edit.putString(BRIDGE_CONNECTION_ID_KEY, connectionId);
+        edit.commit();
+    }
+
+    public String getBridgeConnectionId() {
+        SharedPreferences preferences = this.context.getSharedPreferences(PREFERENCES_NAME, MODE_PRIVATE);
+        return preferences.getString(BRIDGE_CONNECTION_ID_KEY, null);
+    }
+
+    public void setBridgeAuthenticationToken(String bridgeAuthToken) {
+        SharedPreferences preferences = this.context.getSharedPreferences(PREFERENCES_NAME, MODE_PRIVATE);
+        SharedPreferences.Editor edit = preferences.edit();
+
+        edit.putString(BRIDGE_AUTHENTICATION_TOKEN_KEY, bridgeAuthToken);
+        edit.commit();
+    }
+
+    public String getBridgeAuthenticationToken() {
+        SharedPreferences preferences = this.context.getSharedPreferences(PREFERENCES_NAME, MODE_PRIVATE);
+        return preferences.getString(BRIDGE_AUTHENTICATION_TOKEN_KEY, null);
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/DeckPreviewActivity.java

@@ -2,36 +2,158 @@ package com.codigoparallevar.minicards;
 
 import android.app.Dialog;
 import android.content.DialogInterface;
+import android.content.Intent;
+import android.os.AsyncTask;
 import android.os.Bundle;
-import android.support.design.widget.FloatingActionButton;
-import android.support.v7.app.AlertDialog;
-import android.support.v7.widget.Toolbar;
+import android.text.Editable;
+import android.text.TextWatcher;
 import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
+import android.widget.Button;
 import android.widget.EditText;
 import android.widget.ListView;
+import android.widget.TextView;
 import android.widget.Toast;
 
+import androidx.appcompat.app.AlertDialog;
+import androidx.appcompat.widget.Toolbar;
+
+import com.codigoparallevar.minicards.bridge.ProgramakerBridgeService;
+import com.codigoparallevar.minicards.types.functional.Consumer;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+import com.codigoparallevar.minicards.types.functional.Tuple3;
+import com.codigoparallevar.minicards.ui_helpers.GetAsync;
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
+import com.programaker.api.ProgramakerApi;
+
 import java.io.File;
 import java.io.IOException;
 import java.util.List;
 import java.util.Vector;
 
 public class DeckPreviewActivity extends ReloadableAppCompatActivity {
-
     public static final String INTENT = "com.codigoparallevar.minicards.DECK";
+    private static final String LogTag = "DeckPreview";
+
     private ListView listView;
     private CardPreviewArrayAdapter cardArrayAdapter;
+    private ProgramakerApi ProgramakerApi;
+    private ConfigManager Config;
+
+    protected void openLoginDialog(View view) {
+        AlertDialog.Builder builder = new AlertDialog.Builder(this);
+
+        final View loginDialog = (LayoutInflater.from(this)
+                .inflate(R.layout.login_dialog_view, null));
+
+        final EditText loginUsernameText = loginDialog.findViewById(R.id.login_username_text);
+        final EditText loginPasswordText = loginDialog.findViewById(R.id.login_password_text);
+        final Button loginButton = loginDialog.findViewById(R.id.login_dialog_login_button);
+        final Button cancelButton = loginDialog.findViewById(R.id.login_dialog_cancel_button);
+        final TextView messageLabel = loginDialog.findViewById(R.id.login_message_label);
+
+        builder.setTitle("Login").setView(loginDialog);
+        final Dialog dialog = builder.create();
+        dialog.show();
+
+        cancelButton.setOnClickListener(new View.OnClickListener(){
+            @Override
+            public void onClick(View v) {
+                dialog.cancel();
+            }
+        });
+
+        final TextWatcher watcher = (new TextWatcher() {
+            @Override
+            public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
+
+            @Override
+            public void onTextChanged(CharSequence s, int start, int before, int count) {}
+
+            @Override
+            public void afterTextChanged(Editable s) {
+                if ((messageLabel.getVisibility() != View.VISIBLE) &&
+                        (loginUsernameText.getText().length() > 0) &&
+                        (loginPasswordText.getText().length() > 0)) {
+                    loginButton.setEnabled(true);
+                } else {
+                    loginButton.setEnabled(false);
+                }
+            }
+        });
+
+        loginButton.setEnabled(false);
+        loginUsernameText.addTextChangedListener(watcher);
+        loginPasswordText.addTextChangedListener(watcher);
+
+        loginButton.setOnClickListener(new View.OnClickListener(){
+            @Override
+            public void onClick(View v) {
+                messageLabel.setVisibility(View.VISIBLE);
+                messageLabel.setText(R.string.loading);
+                new CheckLogin().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR,
+                        new Tuple3<>(
+                                loginUsernameText.getText().toString(),
+                                loginPasswordText.getText().toString(),
+                                token -> {
+                                    if (token == null) {
+                                        messageLabel.setText(R.string.invalid_user_pass);
+                                    } else {
+                                        DeckPreviewActivity.this.Config.setToken(token);
+                                        DeckPreviewActivity.this.ProgramakerApi.setToken(token);
+                                        final Button loginToProgramakerButton = findViewById(R.id.login_in_programaker_button);
+
+                                        loginToProgramakerButton.setVisibility(View.GONE);
+                                        // Re-check... just in case
+                                        checkNeededLoginButton(
+                                                DeckPreviewActivity.this.ProgramakerApi,
+                                                loginToProgramakerButton);
+                                        dialog.cancel();
+                                    }
+                                }));
+            }
+        });
+    }
+
+    static class CheckLogin extends  AsyncTask<Tuple3<String, String, Consumer<String>>,
+            Void, Tuple2<String, Consumer<String>>>{
+        @Override
+        protected Tuple2<String, Consumer<String>> doInBackground(Tuple3<String, String, Consumer<String>>... tuples) {
+            ProgramakerApi api = new ProgramakerApi();
+            String token = null;
+            try {
+                token = api.login(tuples[0]._x, tuples[0]._y);
+            }
+            catch (Exception e) {
+                Log.e("Login to PrograMaker", e.toString(), e);
+            }
+            return new Tuple2<>(token, tuples[0]._z);
+        }
+
+        @Override
+        protected void onPostExecute(Tuple2<String, Consumer<String>> result) {
+            try {
+                result.item2.apply(result.item1);
+            }
+            catch (Throwable ex) {
+                Log.e(LogTag, "Error on login UI update", ex);
+            }
+        }
+    }
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+
+        this.Config = new ConfigManager(this);
+        this.ProgramakerApi = new ProgramakerApi();
+
         setContentView(R.layout.activity_deck_preview);
-        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
+        Toolbar toolbar = findViewById(R.id.toolbar);
         setSupportActionBar(toolbar);
 
-        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.create_new_card_fab);
+        FloatingActionButton fab = findViewById(R.id.create_new_card_fab);
         fab.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View view) {
@@ -39,7 +161,43 @@ public class DeckPreviewActivity extends ReloadableAppCompatActivity {
             }
         });
 
-        listView = (ListView) findViewById(R.id.card_deck_list);
+        final Button loginButton = findViewById(R.id.login_in_programaker_button);
+        loginButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                DeckPreviewActivity.this.openLoginDialog(v);
+            }
+       });
+
+        listView = findViewById(R.id.card_deck_list);
+        String token = this.Config.getToken();
+        if (token == null) {
+            loginButton.setVisibility(View.VISIBLE);
+        }
+        else {
+
+            this.ProgramakerApi.setToken(token);
+            loginButton.setVisibility(View.GONE);
+            // Double check that is not needed, token might have been deleted
+            checkNeededLoginButton(this.ProgramakerApi, loginButton);
+        }
+    }
+
+    private void checkNeededLoginButton(ProgramakerApi api, Button loginButton) {
+        new GetAsync<Boolean>().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR,
+                new Tuple3<>(
+                        () -> api.check(),
+                        result -> {
+                            if (!result) {
+                                loginButton.setVisibility(View.VISIBLE);
+                                DeckPreviewActivity.this.Config.removeBridgeId();
+                            } else {
+                                Intent intent = new Intent(this, ProgramakerBridgeService.class);
+                                startService(intent);
+                            }
+                        },
+                        ex -> Log.e(LogTag, "Error checking API:" + ex, ex)
+                ));
     }
 
     @Override
@@ -61,7 +219,7 @@ public class DeckPreviewActivity extends ReloadableAppCompatActivity {
         final View openCardOptions = (LayoutInflater.from(this)
                 .inflate(R.layout.create_new_card_view, null));
 
-        final EditText cardNameEditText = (EditText) openCardOptions.findViewById(R.id.card_name_edit_text);
+        final EditText cardNameEditText = openCardOptions.findViewById(R.id.card_name_edit_text);
 
         builder.setTitle("Create a new card")
                 .setView(openCardOptions)

app/src/main/java/com/codigoparallevar/minicards/PartInstantiator.java

@@ -2,7 +2,7 @@ package com.codigoparallevar.minicards;
 
 import com.codigoparallevar.minicards.types.Part;
 import com.codigoparallevar.minicards.types.PartGrid;
-import com.codigoparallevar.minicards.types.Tuple2;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
 
 public abstract class PartInstantiator {
     protected abstract Part instantiate(PartGrid grid, Tuple2<Integer, Integer> center);

app/src/main/java/com/codigoparallevar/minicards/PartsHolder.java

@@ -1,67 +0,0 @@
-package com.codigoparallevar.minicards;
-
-import android.app.Dialog;
-import android.content.Context;
-import android.content.DialogInterface;
-import android.support.v7.app.AlertDialog;
-import android.util.Log;
-
-import com.codigoparallevar.minicards.parts.buttons.RoundButton;
-import com.codigoparallevar.minicards.parts.logic.Ticker;
-import com.codigoparallevar.minicards.parts.logic.Toggle;
-import com.codigoparallevar.minicards.parts.samples.ColorBox;
-import com.codigoparallevar.minicards.parts.strings.ConvertToString;
-import com.codigoparallevar.minicards.types.Part;
-import com.codigoparallevar.minicards.types.Tuple2;
-
-import java.util.List;
-import java.util.Vector;
-
-class PartsHolder {
-    private final Context context;
-
-    private final static List<Tuple2<String, PartInstantiator>> BuiltInParts =
-            new Vector<Tuple2<String, PartInstantiator>>(){{
-                add(new Tuple2<>("Round button", RoundButton.getInstantiator()));
-                add(new Tuple2<>("Ticker", Ticker.getInstantiator()));
-                add(new Tuple2<>("Red/Green box", ColorBox.getInstantiator()));
-                add(new Tuple2<>("Toggle", Toggle.getInstantiator()));
-                add(new Tuple2<>("ToString", ConvertToString.getInstantiator()));
-    }};
-
-    public PartsHolder(Context context) {
-        this.context = context;
-    }
-
-    public void openAddPartModal(final CanvasView canvasView) {
-        AlertDialog.Builder builder = new AlertDialog.Builder(context);
-        builder.setTitle("Choose part type")
-                .setItems(getPartTypes(), new DialogInterface.OnClickListener() {
-                    public void onClick(DialogInterface dialog, int which) {
-                        if ((which >= 0) && (which < BuiltInParts.size())){
-                            Log.d("Minicards partsHolder",
-                                    "Spawning " + BuiltInParts.get(which).item1);
-                            PartInstantiator instantiator = BuiltInParts.get(which).item2;
-                            PartsHolder.this.runInstantiator(instantiator, canvasView);
-                        }
-                    }
-                });
-
-        Dialog dialog = builder.create();
-        dialog.show();
-    }
-
-    private void runInstantiator(PartInstantiator instantiator, CanvasView canvasView) {
-        Part part = instantiator.build(canvasView);
-        canvasView.addPart(part);
-    }
-
-    private static String[] getPartTypes() {
-        String[] partTypes = new String[BuiltInParts.size()];
-        for (int i = 0; i < BuiltInParts.size(); i++){
-            partTypes[i] = BuiltInParts.get(i).item1;
-        }
-
-        return partTypes;
-    }
-}

app/src/main/java/com/codigoparallevar/minicards/ReloadableAppCompatActivity.java

@@ -1,6 +1,6 @@
 package com.codigoparallevar.minicards;
 
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 
 abstract class ReloadableAppCompatActivity extends AppCompatActivity {
     public abstract void reload();

app/src/main/java/com/codigoparallevar/minicards/ScrolledCanvas.java

@@ -1,12 +1,15 @@
 package com.codigoparallevar.minicards;
 
+import android.graphics.Bitmap;
 import android.graphics.Canvas;
 import android.graphics.Paint;
 import android.graphics.Path;
 import android.graphics.Rect;
-import android.support.annotation.NonNull;
+import android.graphics.RectF;
 
-import com.codigoparallevar.minicards.types.Tuple2;
+import androidx.annotation.NonNull;
+
+import com.codigoparallevar.minicards.types.functional.Tuple2;
 
 public class ScrolledCanvas {
     private final Canvas canvas;
@@ -42,7 +45,6 @@ public class ScrolledCanvas {
         canvas.drawPath(offsetPath, paint);
     }
 
-
     public void drawCenteredText(String text, int x, int y, Paint paint) {
         paint.setTextAlign(Paint.Align.LEFT);
         Rect r = new Rect();
@@ -56,4 +58,17 @@ public class ScrolledCanvas {
     public void drawText(String text, int x, int y, Paint paint) {
         canvas.drawText(text, x - xOrig, y - yOrig, paint);
     }
+
+    public void drawRoundRect(RectF rect, float rx, float ry, Paint paint) {
+        rect.offset(-xOrig, -yOrig);
+        canvas.drawRoundRect(rect, rx, ry, paint);
+    }
+
+    public void drawBitmap(Bitmap bitmap, Rect rect) {
+        rect.offset(-xOrig, -yOrig);
+        canvas.drawBitmap(bitmap,
+                new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight()),
+                rect,
+                null);
+    }
 }

app/src/main/java/com/codigoparallevar/minicards/SignalListenerManager.java

@@ -0,0 +1,117 @@
+package com.codigoparallevar.minicards;
+
+import android.util.Log;
+
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+import com.programaker.api.ProgramakerApi;
+import com.programaker.api.ProgramakerListeningChannel;
+import com.programaker.api.ProgramakerSignalListener;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.util.HashMap;
+import java.util.LinkedHashMap;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+
+public class SignalListenerManager implements ProgramakerSignalListener {
+    private final ProgramakerApi api;
+    private final Map<Tuple2<String, String>, List<ProgramakerSignalListener>> channelToListener = new LinkedHashMap<>();
+    private final Map<ProgramakerSignalListener, List<Tuple2<String, String>>> listenerChannels = new LinkedHashMap<>();
+    private final Map<Tuple2<String, String>, ProgramakerListeningChannel> idToChannel = new LinkedHashMap<>();
+    private long RECONNECT_SLEEP_TIME = 2000; // 2seconds
+    private final static String LogTag = "Signal Listener Manager";
+
+    public SignalListenerManager(ProgramakerApi api) {
+        this.api = api;
+    }
+
+    public void registerSignalListener(String bridgeId, String key, ProgramakerSignalListener listener) {
+        Tuple2<String, String> id = new Tuple2<>(bridgeId, key);
+        if (!idToChannel.containsKey(id)) {
+            // Channel has to be opened
+            idToChannel.put(id, this.api.openChannelTo(bridgeId, key, this,
+                    () -> {
+                        SignalListenerManager.this.onDisconnect(bridgeId, key);
+                    }));
+        }
+
+        if (!channelToListener.containsKey(id)) {
+            channelToListener.put(id, new LinkedList<>());
+        }
+        List<ProgramakerSignalListener> listeners = channelToListener.get(id);
+        listeners.add(listener);
+
+        if (!listenerChannels.containsKey(listener)) {
+            listenerChannels.put(listener, new LinkedList<>());
+        }
+        listenerChannels.get(listener).add(id);
+    }
+
+    public void unregisterSignalListener(ProgramakerSignalListener listener) {
+        List<Tuple2<String, String>> channels = listenerChannels.get(listener);
+        listenerChannels.remove(listener);
+        for (Tuple2<String, String> id : channels) {
+            List<ProgramakerSignalListener> remainingListeners = channelToListener.get(id);
+
+            remainingListeners.remove(listener);
+            if (remainingListeners.size() == 0) {
+                ProgramakerListeningChannel channel = idToChannel.get(id);
+                idToChannel.remove(id);
+                channelToListener.remove(id);
+
+                channel.stop();
+            }
+        }
+    }
+
+    private void onDisconnect(String bridgeId, String key) {
+        Tuple2<String, String> id = new Tuple2<>(bridgeId, key);
+
+        // Check that there is still someone listening
+        if (!this.channelToListener.containsKey(id)) {
+            return;
+        }
+        if (this.channelToListener.get(id).size() == 0) {
+            this.channelToListener.remove(id);
+            return;
+        }
+
+        // On disconnect disable the connection, wait 2 seconds and retry
+        idToChannel.put(id, null);
+        
+        new Thread(() -> {
+            try {
+                Thread.sleep(RECONNECT_SLEEP_TIME);
+            } catch (InterruptedException e) {
+                e.printStackTrace();
+            }
+
+            idToChannel.put(id, this.api.openChannelTo(bridgeId, key, this,
+                    () -> {
+                        SignalListenerManager.this.onDisconnect(bridgeId, key);
+                    }));
+        }).start();
+    }
+
+    @Override
+    public void onNewSignal(@NotNull String bridgeId, @NotNull String key, @NotNull HashMap<?, ?> signal) {
+        Tuple2<String, String> id = new Tuple2<>(bridgeId, key);
+
+        if (!channelToListener.containsKey(id)) {
+            Log.e(LogTag, "Got signal to unlistened channel (bridgeId=" + bridgeId + ",key=" + key + ")");
+            return;
+        }
+
+        for (ProgramakerSignalListener listener : channelToListener.get(id)) {
+            try {
+                listener.onNewSignal(bridgeId, key, signal);
+            }
+            catch (Exception ex) {
+                Log.e(LogTag, "Error passing message (bridge=" + bridgeId + ",key" + key
+                        + ") to " + listener, ex);
+            }
+        }
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/StubPartGrid.java

@@ -2,10 +2,13 @@ package com.codigoparallevar.minicards;
 
 import com.codigoparallevar.minicards.types.PartGrid;
 import com.codigoparallevar.minicards.types.Selectable;
-import com.codigoparallevar.minicards.types.Tuple2;
+import com.codigoparallevar.minicards.types.connectors.input.AnyInputConnector;
+import com.codigoparallevar.minicards.types.connectors.input.ImageInputConnector;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
 import com.codigoparallevar.minicards.types.connectors.input.BooleanInputConnector;
 import com.codigoparallevar.minicards.types.connectors.input.SignalInputConnector;
 import com.codigoparallevar.minicards.types.connectors.input.StringInputConnector;
+import com.programaker.api.ProgramakerApi;
 
 class StubPartGrid implements PartGrid {
     @Override
@@ -13,6 +16,16 @@ class StubPartGrid implements PartGrid {
         return null;
     }
 
+    @Override
+    public ProgramakerApi getApi() {
+        return null;
+    }
+
+    @Override
+    public SignalListenerManager getListenerManager() {
+        return null;
+    }
+
     @Override
     public SignalInputConnector getSignalInputConnectorOn(int x, int y) {
         return null;
@@ -23,6 +36,21 @@ class StubPartGrid implements PartGrid {
         return null;
     }
 
+    @Override
+    public AnyInputConnector getAnyInputConnectorOn(int x, int y) {
+        return null;
+    }
+
+    @Override
+    public StringInputConnector getStringInputConnectorOn(int xEnd, int yEnd) {
+        return null;
+    }
+
+    @Override
+    public ImageInputConnector getImageInputConnectorOn(int xEnd, int yEnd) {
+        return null;
+    }
+
     @Override
     public Tuple2<Integer, Integer> getCenteredOn() {
         return null;
@@ -32,8 +60,4 @@ class StubPartGrid implements PartGrid {
     public void update() {
     }
 
-    @Override
-    public StringInputConnector getStringInputConnectorOn(int xEnd, int yEnd) {
-        return null;
-    }
 }

app/src/main/java/com/codigoparallevar/minicards/bridge/ProgramakerAndroidBridge.java

@@ -0,0 +1,59 @@
+package com.codigoparallevar.minicards.bridge;
+
+import android.content.Context;
+import android.provider.Settings;
+
+import com.codigoparallevar.minicards.ConfigManager;
+import com.codigoparallevar.minicards.bridge.blocks.DefaultAndroidBlocks;
+import com.codigoparallevar.minicards.bridge.helpers.StatusStreamer;
+import com.programaker.bridge.ProgramakerBridge;
+import com.programaker.bridge.ProgramakerBridgeConfiguration;
+
+public class ProgramakerAndroidBridge {
+    private static final String LogTag = "PM Android Bridge";
+    private ProgramakerBridge bridgeRunner = null;
+    private StatusStreamer statusStreamer = null;
+
+    // Static
+    public static ProgramakerAndroidBridge configure(Context ctx, String userId, String bridgeId, String bridgeToken) {
+        return new ProgramakerAndroidBridge(ctx, userId, bridgeId, bridgeToken);
+    }
+
+    public static String GetBridgeName(Context ctx) {
+        String deviceName = Settings.Secure.getString(ctx.getContentResolver(), "bluetooth_name");
+        String serviceName = "MiniCards on " + deviceName;
+        return serviceName;
+    }
+
+    // Builder
+    private final Context ctx;
+    private final String userId;
+    private final String bridgeId;
+    private final String bridgeToken;
+
+    private ProgramakerAndroidBridge(Context ctx, String userId, String bridgeId, String bridgeToken) {
+        this.ctx = ctx;
+        this.userId = userId;
+        this.bridgeId = bridgeId;
+        this.bridgeToken = bridgeToken;
+    }
+
+    public void start(Runnable onReady, Runnable onComplete) {
+        ProgramakerBridgeConfiguration configuration = new ProgramakerBridgeConfiguration(
+                ProgramakerAndroidBridge.GetBridgeName(this.ctx),
+                new ConfigManager(this.ctx),
+                DefaultAndroidBlocks.GetBuilder(this.ctx).Build()
+        );
+
+        this.bridgeRunner = new ProgramakerBridge(this.bridgeId, this.userId, this.bridgeToken, configuration, onReady, onComplete);
+        this.bridgeRunner.run();
+
+        this.statusStreamer = new StatusStreamer(this.ctx, this.bridgeRunner);
+        this.statusStreamer.run();
+    }
+
+    public void stop() {
+        bridgeRunner.stop();
+        this.statusStreamer.stop();
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/bridge/ProgramakerBridgeService.java

@@ -0,0 +1,247 @@
+package com.codigoparallevar.minicards.bridge;
+
+import android.app.Notification;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
+import android.app.Service;
+import android.content.Context;
+import android.content.Intent;
+import android.os.AsyncTask;
+import android.os.IBinder;
+import android.os.Process;
+import android.util.Log;
+import android.widget.Toast;
+
+import androidx.core.app.NotificationCompat;
+
+import com.codigoparallevar.minicards.ConfigManager;
+import com.codigoparallevar.minicards.R;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+import com.codigoparallevar.minicards.ui_helpers.DoAsync;
+import com.programaker.api.ProgramakerApi;
+
+enum ServiceState {
+    LOADING,
+    RUNNING,
+    STOPPED,
+}
+
+public class ProgramakerBridgeService extends Service {
+    public static final String BridgeUserNotificationChannel = "PROGRAMAKER_BRIDGE_USER_NOTIFICATION";
+    public static final CharSequence BridgeUserNotificationChannelName = "User notifications";
+    private static final String AUTOGENERATED_TOKEN_NAME = "Auto-generated";
+    public static String BridgeUserVibrationNotificationChannel = "PROGRAMAKER_BRIDGE_USER_VIBRATION_NOTIFICATIONS";
+    public static CharSequence BridgeUserVibrationNotificationChannelName = "User-triggered vibration";
+
+    private static String BridgeStatusNotificationChannel = "PROGRAMAKER_BRIDGE_STATUS_NOTIFICATION";
+    private static CharSequence BridgeStatusNotificationChannelName = "Programaker bridge status";
+
+    private static final int BridgeStatusNotificationId = 9999;
+    public static final String COMMAND_PROGRAMAKER_BRIDGE_STOP = "com.programaker.bridge.commands.stop";
+    public static final String COMMAND_PROGRAMAKER_BRIDGE_START = "com.programaker.bridge.commands.start";
+
+    private static final long WAIT_TIME_BEFORE_RESTART_MILLIS = 10000; // 10s
+    private ProgramakerAndroidBridge bridge = null;
+    private static final String LogTag = "PM BridgeService";
+    private boolean stopped = false;
+
+    @Override
+    public void onCreate() {
+        setBridgeStatusNotification(getString(R.string.bridge_service_not_started), ServiceState.LOADING, null);
+    }
+
+    private void setBridgeStatusNotification(String title, ServiceState state, String description) {
+        NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
+        assert notificationManager != null;
+
+        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
+            NotificationChannel channel = new NotificationChannel(
+                    ProgramakerBridgeService.BridgeStatusNotificationChannel,
+                    ProgramakerBridgeService.BridgeStatusNotificationChannelName,
+                    NotificationManager.IMPORTANCE_DEFAULT);
+            channel.enableVibration(false);
+            notificationManager.createNotificationChannel(channel);
+        }
+
+        Intent stopIntent = new Intent(this, ProgramakerBridgeService.class);
+        stopIntent.setAction(COMMAND_PROGRAMAKER_BRIDGE_STOP);
+        PendingIntent stopPendingIntent =
+                PendingIntent.getService(this, 0, stopIntent, 0);
+
+        Intent startIntent = new Intent(this, ProgramakerBridgeService.class);
+        startIntent.setAction(COMMAND_PROGRAMAKER_BRIDGE_START);
+        PendingIntent startPendingIntent =
+                PendingIntent.getService(this, 0, startIntent, 0);
+
+        NotificationCompat.Builder builder = new NotificationCompat
+                .Builder(this, ProgramakerBridgeService.BridgeStatusNotificationChannel)
+                .setContentTitle(title)
+                .setPriority(NotificationCompat.PRIORITY_DEFAULT);
+
+
+        if (state == ServiceState.STOPPED) {
+            builder.addAction(R.drawable.ic_start, getString(R.string.start_bridge), startPendingIntent)
+                    .setSmallIcon(R.drawable.ic_vector_stopped_icon);
+        }
+        else {
+            builder.addAction(R.drawable.ic_cancel, getString(R.string.stop_bridge), stopPendingIntent);
+
+            if (state == ServiceState.RUNNING) {
+                builder.setSmallIcon(R.drawable.ic_vector_icon);
+            }
+            else {
+                builder.setSmallIcon(R.drawable.ic_vector_icon_loading);
+            }
+        }
+
+        if (description != null) {
+            builder.setContentText(description);
+        }
+
+        Notification notification = builder.build();
+
+        if (stopped) {
+            notificationManager.notify(BridgeStatusNotificationId, notification);
+        }
+        else {
+            this.startForeground(BridgeStatusNotificationId, notification);
+        }
+    }
+
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        String action = null;
+        if (intent != null) { // Apparently this (intent=null) can happen...
+            action = intent.getAction();
+        }
+        if (action == null) {
+            action = "";
+        }
+
+        if (action.equals(COMMAND_PROGRAMAKER_BRIDGE_STOP)) {
+            this.stopSelf();
+        }
+        else {
+            connectBridge();
+        }
+
+        // If we get killed, after returning from here, restart
+        return START_STICKY;
+    }
+
+    private void connectBridge() {
+        stopped = false;
+        ConfigManager config = new ConfigManager(this);
+
+        String token = config.getToken();
+        if (token == null) {
+            Toast.makeText(this, "Cannot start bridge", Toast.LENGTH_SHORT).show();
+            Log.e(LogTag, "Cannot start bridge: Token is null");
+            this.stopSelf();
+        }
+
+        if (ProgramakerBridgeService.this.bridge != null) {
+            // Toast.makeText(this, "Bridge already started", Toast.LENGTH_SHORT).show();
+            Log.w(LogTag, "Bridge already started (not null)");
+        }
+
+        // Start up the thread running the service. Note that we create a
+        // separate thread because the service normally runs in the process's
+        // main thread, which we don't want to block. We also make it
+        // background priority so CPU-intensive work doesn't disrupt our UI.
+        Thread thread = new Thread(() -> {
+            try {
+                ProgramakerApi api = new ProgramakerApi();
+                api.setToken(token);
+                String userId = api.getUserId();
+
+                String bridgeIdCheck = config.getBridgeId();
+                if (bridgeIdCheck == null) {
+                    bridgeIdCheck = api.createBridge(ProgramakerAndroidBridge.GetBridgeName(this));
+                    config.setBridgeId(bridgeIdCheck);
+                }
+
+                String bridgeAuthCheck = config.getBridgeAuthenticationToken();
+                if (bridgeAuthCheck == null) {
+                    bridgeAuthCheck = api.createBridgeAuthenticationToken(bridgeIdCheck, ProgramakerBridgeService.AUTOGENERATED_TOKEN_NAME);
+                    config.setBridgeAuthenticationToken(bridgeAuthCheck);
+                }
+
+                final String bridgeId = bridgeIdCheck;
+                final String bridgeAuth = bridgeAuthCheck;
+
+                ProgramakerBridgeService.this.bridge = ProgramakerAndroidBridge.configure(
+                        this,
+                        userId,
+                        bridgeId,
+                        bridgeAuth);
+                ProgramakerBridgeService.this.bridge.start(
+                        () -> { // On ready
+                            setBridgeStatusNotification(getString(R.string.bridge_service_online), ServiceState.RUNNING, null);
+                            if (config.getBridgeConnectionId() == null) {
+                                new DoAsync().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR,
+                                        new Tuple2<>(
+                                                () -> {
+                                                    boolean established = api.establishConnection(bridgeId);
+                                                    if (!established) {
+                                                        Log.e(LogTag, "Error establishing connection to bridge");
+                                                    }
+                                                },
+                                                ex -> {
+                                                    Log.e(LogTag, "Error establishing bridge connection: " + ex, ex);
+                                                    ProgramakerBridgeService.this.stopSelf();
+                                                }
+                                        )
+                                );
+                            }
+                        },
+                        () -> { // On completed
+                            onBridgeFailedAfterConnected();
+                        });
+            }
+            catch (Throwable ex) {
+                Log.e(LogTag, "Error on bridge", ex);
+                ProgramakerBridgeService.this.bridge = null;
+                setBridgeStatusNotification(getString(R.string.bridge_service_starting),
+                        ServiceState.STOPPED,
+                        getString(R.string.error_establishing_connection));
+            }
+        }, "ServiceStartArguments");
+        thread.setPriority(Process.THREAD_PRIORITY_BACKGROUND);
+
+        setBridgeStatusNotification(getString(R.string.bridge_service_starting), ServiceState.LOADING, null);
+        thread.start();
+    }
+
+    private void onBridgeFailedAfterConnected() {
+        ProgramakerBridgeService.this.bridge = null;
+
+        if (!stopped) {
+            Log.e(LogTag, "Bridge stopped after connected. Waiting 10s then restarting");
+            setBridgeStatusNotification(getString(R.string.bridge_service_failed_restarting), ServiceState.LOADING, null);
+            try {
+                Thread.sleep(WAIT_TIME_BEFORE_RESTART_MILLIS);
+            } catch (InterruptedException e) {
+                e.printStackTrace();
+            }
+            connectBridge();
+        }
+    }
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        // We don't provide binding, so return null
+        return null;
+    }
+
+    @Override
+    public void onDestroy() {
+        stopped = true;
+        ProgramakerAndroidBridge bridge = this.bridge;
+        if (bridge != null) {
+            bridge.stop();
+        }
+        setBridgeStatusNotification(getString(R.string.bridge_service_failed_stopping), ServiceState.STOPPED, null);
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/bridge/blocks/BlockArgumentDefinition.java

@@ -0,0 +1,51 @@
+package com.codigoparallevar.minicards.bridge.blocks;
+
+import android.util.Log;
+
+import org.jetbrains.annotations.NotNull;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+class BlockArgumentDefinition {
+    private final static String LogTag = "PM BlockArgument";
+    private final Type type;
+    private final String defaultValue;
+
+    public enum Type {
+        STRING,
+        INT,
+        FLOAT,
+        BOOL,
+    }
+
+    BlockArgumentDefinition(BlockArgumentDefinition.Type type, String defaultValue) {
+        this.type = type;
+        this.defaultValue = defaultValue;
+    }
+
+    @NotNull
+    public JSONObject serialize() throws JSONException {
+        JSONObject obj = new JSONObject();
+
+        obj.put("type", BlockArgumentDefinition.TypeToString(type));
+        obj.put("default", this.defaultValue);
+
+        return obj;
+    }
+
+    private static String TypeToString(Type type) {
+        switch (type) {
+            case STRING:
+                return "string";
+            case INT:
+                return "integer";
+            case FLOAT:
+                return "float";
+            case BOOL:
+                return "bool";
+            default:
+                Log.e(LogTag, "Unknown type: " + type);
+                return "string";
+        }
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/bridge/blocks/BridgeBlockListBuilder.java

@@ -0,0 +1,54 @@
+package com.codigoparallevar.minicards.bridge.blocks;
+
+import com.codigoparallevar.minicards.types.functional.Function;
+import com.programaker.bridge.ProgramakerBridgeConfigurationBlock;
+
+import java.util.LinkedList;
+import java.util.List;
+
+public class BridgeBlockListBuilder {
+    private final LinkedList<ProgramakerBridgeConfigurationBlock> blockList;
+
+    public BridgeBlockListBuilder() {
+        this.blockList = new LinkedList<>();
+    }
+
+
+    public List<ProgramakerBridgeConfigurationBlock> Build() {
+        return blockList;
+    }
+
+    public BridgeBlockListBuilder addOperation(String id, String message,
+                                               List<BlockArgumentDefinition> arguments,
+                                               Function<List<?>, Void> operation) {
+        return this.addOperation(new OperationBlockDefinition(id, message, arguments, operation));
+    }
+
+    private BridgeBlockListBuilder addOperation(ProgramakerBridgeConfigurationBlock block) {
+        this.blockList.add(block);
+        return this;
+    }
+
+    public BridgeBlockListBuilder addGetter(String id, String message,
+                                            List<BlockArgumentDefinition> arguments,
+                                            Function<List<?>, ?> operation) {
+        return this.addGetter(new GetterBlockDefinition(id, message, arguments, operation));
+    }
+
+    private BridgeBlockListBuilder addGetter(ProgramakerBridgeConfigurationBlock block) {
+        this.blockList.add(block);
+        return this;
+    }
+
+    public BridgeBlockListBuilder addTrigger(String id, String message,
+                                             List<BlockArgumentDefinition> arguments,
+                                             String key) {
+        return this.addTrigger(new TriggerBlockDefinition(id, message, arguments, key));
+    }
+
+    private BridgeBlockListBuilder addTrigger(TriggerBlockDefinition block) {
+        this.blockList.add(block);
+
+        return this;
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/bridge/blocks/DefaultAndroidBlocks.java

@@ -0,0 +1,216 @@
+package com.codigoparallevar.minicards.bridge.blocks;
+
+import android.app.Notification;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.content.Context;
+import android.net.wifi.SupplicantState;
+import android.net.wifi.WifiInfo;
+import android.net.wifi.WifiManager;
+import android.os.Build;
+import android.os.VibrationEffect;
+import android.os.Vibrator;
+
+import androidx.core.app.NotificationCompat;
+
+import com.codigoparallevar.minicards.R;
+import com.codigoparallevar.minicards.bridge.ProgramakerBridgeService;
+
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Random;
+
+public class DefaultAndroidBlocks {
+
+    private static long VIBRATION_REST_TIME = 1000; // Ms
+    private static long VIBRATION_ACTIVE_TIME = 500; // Ms
+
+    // This means that will take at most ~15 seconds
+    private static int MAX_VIBRATION_CYCLES = 10;
+
+    public static BridgeBlockListBuilder GetBuilder(Context ctx) {
+        // System services
+        NotificationManager notificationManager = (NotificationManager) ctx.getSystemService(Context.NOTIFICATION_SERVICE);
+        Vibrator vibrator = (Vibrator) ctx.getSystemService(Context.VIBRATOR_SERVICE);
+
+        assert notificationManager != null;
+        assert vibrator != null;
+
+        Random notificationRandom = new Random();
+
+        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
+            NotificationChannel channel = new NotificationChannel(
+                    ProgramakerBridgeService.BridgeUserNotificationChannel,
+                    ProgramakerBridgeService.BridgeUserNotificationChannelName,
+                    NotificationManager.IMPORTANCE_DEFAULT);
+            notificationManager.createNotificationChannel(channel);
+
+            NotificationChannel vibrationChannel = new NotificationChannel(
+                    ProgramakerBridgeService.BridgeUserVibrationNotificationChannel,
+                    ProgramakerBridgeService.BridgeUserVibrationNotificationChannelName,
+                    NotificationManager.IMPORTANCE_DEFAULT);
+
+            // Vibration is manually handled for Android O (or superior) devices
+            vibrationChannel.setVibrationPattern(null);
+            notificationManager.createNotificationChannel(vibrationChannel);
+        }
+
+        // OPERATIONS
+        BridgeBlockListBuilder builder = new BridgeBlockListBuilder()
+                // Notifications
+                .addOperation(
+                        "notifications_new",
+                        "Create notification. Title: %1, text: %2",
+                        new LinkedList<BlockArgumentDefinition>() {{
+                            add(new BlockArgumentDefinition(BlockArgumentDefinition.Type.STRING, "My notification"));
+                            add(new BlockArgumentDefinition(BlockArgumentDefinition.Type.STRING, "Sample description"));
+                        }},
+                        (List<?> params) -> {
+                            if (params.size() != 2) {
+                                throw new Exception("Expected two (2) arguments, found " + params.size());
+                            }
+                            String title = params.get(0) == null ? null : params.get(0).toString();
+                            String description = params.get(1) == null ? null : params.get(1).toString();
+
+                            NotificationCompat.Builder notifBuilder = new NotificationCompat
+                                    .Builder(ctx, ProgramakerBridgeService.BridgeUserNotificationChannel)
+                                    .setSmallIcon(R.drawable.ic_vector_icon_user_triggered)
+                                    .setPriority(NotificationCompat.PRIORITY_DEFAULT);
+
+                            if (title != null) {
+                                notifBuilder.setContentTitle(title);
+                            }
+                            if (description != null) {
+                                notifBuilder.setContentText(description);
+                            }
+
+                            Notification notif = notifBuilder.build();
+
+                            int notificationId = notificationRandom.nextInt();
+                            notificationManager.notify(notificationId, notif);
+
+                            return null;
+                        }
+                )
+                .addOperation(
+                        "notifications_clear",
+                        "Clear notifications",
+                        Collections.emptyList(),
+                        (List<?> params) -> {
+                            notificationManager.cancelAll();
+
+                            return null;
+                        }
+                )
+                .addOperation(
+                        "vibration_start",
+                        "Vibrate %1 times",
+                        new LinkedList<BlockArgumentDefinition>() {{
+                            add(new BlockArgumentDefinition(BlockArgumentDefinition.Type.INT, "3"));
+                        }},
+                        (List<?> params) -> {
+                            if (params.size() != 1) {
+                                throw new Exception("Expected one (1) argument1, found " + params.size());
+                            }
+
+                            int userTimes = Integer.parseInt(params.get(0).toString());
+                            final int times = Math.max(1, Math.min(MAX_VIBRATION_CYCLES, userTimes));
+
+                            long[] pattern = new long[times * 2];
+                            for (int i = 0; i < times; i++) {
+                                pattern[i * 2] = VIBRATION_ACTIVE_TIME;
+                                pattern[i * 2 + 1] = VIBRATION_REST_TIME;
+                            }
+
+                            Notification notif = new NotificationCompat
+                                    .Builder(ctx, ProgramakerBridgeService.BridgeUserVibrationNotificationChannel)
+                                    .setContentTitle(ctx.getString(R.string.vibration_activated))
+                                    .setSmallIcon(R.drawable.ic_vector_icon_user_triggered)
+                                    .setPriority(NotificationCompat.PRIORITY_DEFAULT)
+                                    .setAutoCancel(true)
+                                    .setVibrate(pattern)
+                                    .build();
+
+                            int notificationId = notificationRandom.nextInt();
+                            notificationManager.notify(notificationId, notif);
+
+                            if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                                // Manually handle vibration if notification channels are in use
+                                vibrator.vibrate(VibrationEffect.createWaveform(pattern, -1));
+                            }
+
+                            new Thread( () -> {
+                                // Wait the activation time
+                                for (int i = 0; i < times; i++) {
+                                    try {
+                                        Thread.sleep(pattern[i * 2]);
+                                        Thread.sleep(pattern[i * 2 + 1]);
+                                    } catch (InterruptedException e) {
+                                        e.printStackTrace();
+                                    }
+                                }
+
+                                // Remove notification
+                                notificationManager.cancel(notificationId);
+                            }).start();
+
+                            return null;
+                        }
+                )
+                ;
+
+        // GETTERS
+        builder.addGetter(
+                "wifi_is_connected",
+                "Is WIFI connected?",
+                Collections.emptyList(),
+                (List<?> params) -> {
+                    WifiManager wifiManager = (WifiManager) ctx.getApplicationContext().getSystemService(Context.WIFI_SERVICE);
+                    assert wifiManager != null;
+                    WifiInfo wifiInfo = wifiManager.getConnectionInfo();
+
+                    if (wifiInfo == null) {
+                        return false;
+                    }
+
+                    return wifiInfo.getSupplicantState() == SupplicantState.COMPLETED;
+                })
+        .addGetter(
+                "wifi_get_ssid",
+                "Get WIFI SSID",
+                Collections.emptyList(),
+                (List<?> params) -> {
+                    WifiManager wifiManager = (WifiManager) ctx.getApplicationContext().getSystemService(Context.WIFI_SERVICE);
+                    assert wifiManager != null;
+                    WifiInfo wifiInfo = wifiManager.getConnectionInfo();
+
+                    if (wifiInfo == null) {
+                        return null;
+                    }
+
+                    if (wifiInfo.getSupplicantState() != SupplicantState.COMPLETED) {
+                        return null;
+                    }
+
+                    return wifiInfo.getSSID();
+                });
+
+        // Signal blocks
+        builder
+                .addTrigger(
+                        "on_wifi_connected",
+                        "When WIFI connection is ESTABLISHED",
+                        Collections.emptyList(),// TODO: Save content to variable
+                        "on_wifi_connected"
+                )
+                .addTrigger(
+                        "on_wifi_disconnected",
+                        "When WIFI connection is LOST",
+                        Collections.emptyList(),
+                        "on_wifi_disconnected"
+                );
+
+        return builder;
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/bridge/blocks/GetterBlockDefinition.java

@@ -0,0 +1,65 @@
+package com.codigoparallevar.minicards.bridge.blocks;
+
+import android.util.Log;
+
+import com.codigoparallevar.minicards.types.functional.Function;
+import com.programaker.bridge.ProgramakerBridgeConfigurationBlock;
+
+import org.jetbrains.annotations.NotNull;
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.util.List;
+
+class GetterBlockDefinition implements ProgramakerBridgeConfigurationBlock {
+    private final static String LogTag = "PM GetterBlockDef";
+
+    private final String id;
+    private final String message;
+    private final List<BlockArgumentDefinition> args;
+    private final Function<List<?>, ?> operation;
+
+    public GetterBlockDefinition(String id, String message, List<BlockArgumentDefinition> args, Function<List<?>, ?> operation) {
+        this.id = id;
+        this.message = message;
+        this.args = args;
+        this.operation = operation;
+    }
+
+    @NotNull
+    @Override
+    public JSONObject serialize() {
+        JSONObject obj = new JSONObject();
+
+        try {
+            JSONArray arguments = new JSONArray();
+            for (BlockArgumentDefinition arg : this.args) {
+                arguments.put(arg.serialize());
+            }
+
+            obj.put("id", this.id);
+            obj.put("function_name", this.id);
+            obj.put("message", this.message);
+            obj.put("block_type", "getter");
+            obj.put("block_result_type", JSONObject.NULL); // TODO: Properly declare type
+            obj.put("arguments", arguments);
+            obj.put("save_to",  JSONObject.NULL);
+        } catch (JSONException ex) {
+            Log.e(LogTag, "Error serializing block definition: " + ex, ex);
+        }
+
+        return obj;
+    }
+
+    @NotNull
+    @Override
+    public String getFunctionName() {
+        return this.id;
+    }
+
+    @Override
+    public Object call(@NotNull List<?> arguments) throws Exception {
+        return this.operation.apply(arguments);
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/bridge/blocks/OperationBlockDefinition.java

@@ -0,0 +1,65 @@
+package com.codigoparallevar.minicards.bridge.blocks;
+
+import android.util.Log;
+
+import com.codigoparallevar.minicards.types.functional.Function;
+import com.programaker.bridge.ProgramakerBridgeConfigurationBlock;
+
+import org.jetbrains.annotations.NotNull;
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.util.List;
+
+class OperationBlockDefinition implements ProgramakerBridgeConfigurationBlock {
+    private final static String LogTag = "PM OpBlockDef";
+
+    private final String id;
+    private final String message;
+    private final List<BlockArgumentDefinition> args;
+    private final Function<List<?>, Void> operation;
+
+    public OperationBlockDefinition(String id, String message, List<BlockArgumentDefinition> args, Function<List<?>, Void> operation) {
+        this.id = id;
+        this.message = message;
+        this.args = args;
+        this.operation = operation;
+    }
+
+    @NotNull
+    @Override
+    public JSONObject serialize() {
+        JSONObject obj = new JSONObject();
+
+        try {
+            JSONArray arguments = new JSONArray();
+            for (BlockArgumentDefinition arg : this.args) {
+                arguments.put(arg.serialize());
+            }
+
+            obj.put("id", this.id);
+            obj.put("function_name", this.id);
+            obj.put("message", this.message);
+            obj.put("block_type", "operation");
+            obj.put("block_result_type", JSONObject.NULL);
+            obj.put("arguments", arguments);
+            obj.put("save_to",  JSONObject.NULL);
+        } catch (JSONException ex) {
+            Log.e(LogTag, "Error serializing block definition: " + ex, ex);
+        }
+
+        return obj;
+    }
+
+    @NotNull
+    @Override
+    public String getFunctionName() {
+        return this.id;
+    }
+
+    @Override
+    public Object call(@NotNull List<?> arguments) throws Exception {
+        return this.operation.apply(arguments);
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/bridge/blocks/TriggerBlockDefinition.java

@@ -0,0 +1,67 @@
+package com.codigoparallevar.minicards.bridge.blocks;
+
+import android.util.Log;
+
+import com.programaker.bridge.ProgramakerBridgeConfigurationBlock;
+
+import org.jetbrains.annotations.NotNull;
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.util.List;
+
+class TriggerBlockDefinition implements ProgramakerBridgeConfigurationBlock {
+    private final static String LogTag = "PM TriggerBlockDef";
+
+    private final String id;
+    private final String message;
+    private final List<BlockArgumentDefinition> args;
+    private final String key;
+
+    public TriggerBlockDefinition(String id, String message, List<BlockArgumentDefinition> args,
+                                    String key) {
+        this.id = id;
+        this.message = message;
+        this.args = args;
+        this.key = key;
+    }
+
+    @NotNull
+    @Override
+    public JSONObject serialize() {
+        JSONObject obj = new JSONObject();
+
+        try {
+            JSONArray arguments = new JSONArray();
+            for (BlockArgumentDefinition arg : this.args) {
+                arguments.put(arg.serialize());
+            }
+
+            obj.put("id", this.id);
+            obj.put("function_name", this.id);
+            obj.put("message", this.message);
+            obj.put("arguments", arguments);
+            obj.put("save_to",  JSONObject.NULL);
+            obj.put("expected_value",  JSONObject.NULL);
+            obj.put("block_type", "trigger");
+            obj.put("key", this.key);
+            obj.put("subkey", JSONObject.NULL);
+        } catch (JSONException ex) {
+            Log.e(LogTag, "Error serializing block definition: " + ex, ex);
+        }
+
+        return obj;
+    }
+
+    @NotNull
+    @Override
+    public String getFunctionName() {
+        return this.id;
+    }
+
+    @Override
+    public Object call(@NotNull List<?> arguments) throws Exception {
+        throw new IllegalArgumentException("Non executable block");
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/bridge/helpers/StatusStreamer.java

@@ -0,0 +1,78 @@
+package com.codigoparallevar.minicards.bridge.helpers;
+
+import android.content.Context;
+import android.net.ConnectivityManager;
+import android.net.Network;
+import android.net.NetworkCapabilities;
+import android.net.NetworkRequest;
+import android.net.wifi.SupplicantState;
+import android.net.wifi.WifiInfo;
+import android.net.wifi.WifiManager;
+import android.os.Build;
+
+import com.programaker.bridge.ProgramakerBridge;
+
+import org.json.JSONObject;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class StatusStreamer {
+    private final Context ctx;
+    private final ProgramakerBridge bridge;
+    private WifiNetworkCallbackReceiver networkCallback = null;
+
+    public StatusStreamer(Context ctx, ProgramakerBridge bridge) {
+        this.ctx = ctx;
+        this.bridge = bridge;
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+            this.networkCallback = new WifiNetworkCallbackReceiver(this);
+        }
+    }
+
+    public void run() {
+
+        if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.LOLLIPOP) {
+            return;
+        }
+
+        NetworkRequest.Builder builder = new NetworkRequest.Builder();
+        builder.addTransportType(NetworkCapabilities.TRANSPORT_WIFI);
+
+        ConnectivityManager connManager = (ConnectivityManager) this.ctx.getSystemService(Context.CONNECTIVITY_SERVICE);
+        assert connManager != null;
+
+        connManager.registerNetworkCallback(builder.build(), this.networkCallback);
+    }
+
+    public void stop() {
+        ConnectivityManager connManager = (ConnectivityManager) this.ctx.getSystemService(Context.CONNECTIVITY_SERVICE);
+        assert connManager != null;
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+            connManager.unregisterNetworkCallback(this.networkCallback);
+        }
+    }
+
+    public void onWifiNetworkConnected(Network network) {
+        WifiManager wifiManager = (WifiManager) this.ctx.getSystemService(Context.WIFI_SERVICE);
+        WifiInfo wifiInfo;
+
+        wifiInfo = wifiManager.getConnectionInfo();
+        String ssid = "";
+        if (wifiInfo.getSupplicantState() == SupplicantState.COMPLETED) {
+            // This might not return the SSID in case the user has not granted location permissions to the app
+            // see: https://stackoverflow.com/a/54446042
+            ssid = wifiInfo.getSSID();
+        }
+
+        Map<String, String> data = new HashMap<>();
+        data.put("ssid", ssid);
+
+        this.bridge.sendSignal("on_wifi_connected", new JSONObject(data));
+    }
+
+    public void onWifiNetworkDisconnected() {
+        this.bridge.sendSignal("on_wifi_disconnected", new JSONObject());
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/bridge/helpers/WifiNetworkCallbackReceiver.java

@@ -0,0 +1,34 @@
+package com.codigoparallevar.minicards.bridge.helpers;
+
+import android.net.ConnectivityManager;
+import android.net.Network;
+import android.os.Build;
+
+import androidx.annotation.RequiresApi;
+
+@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
+class WifiNetworkCallbackReceiver extends ConnectivityManager.NetworkCallback {
+    private final StatusStreamer streamer;
+
+    public WifiNetworkCallbackReceiver(StatusStreamer statusStreamer) {
+        this.streamer = statusStreamer;
+    }
+
+    @Override
+    public void onAvailable(Network network) {
+        super.onAvailable(network);
+        this.streamer.onWifiNetworkConnected(network);
+    }
+
+    @Override
+    public void onUnavailable() {
+        super.onUnavailable();
+        this.streamer.onWifiNetworkDisconnected();
+    }
+
+    @Override
+    public void onLost(Network network) {
+        super.onLost(network);
+        this.streamer.onWifiNetworkDisconnected();
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/parts/ProgramakerCustomBlockPart.java

@@ -0,0 +1,726 @@
+package com.codigoparallevar.minicards.parts;
+
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.graphics.Rect;
+import android.os.AsyncTask;
+import android.util.Log;
+
+import com.codigoparallevar.minicards.ScrolledCanvas;
+import com.codigoparallevar.minicards.parts.connectors.ProgramakerCustomBlockInputConnector;
+import com.codigoparallevar.minicards.parts.connectors.AnyRoundOutputConnector;
+import com.codigoparallevar.minicards.parts.connectors.ConnectorTypeInfo;
+import com.codigoparallevar.minicards.parts.connectors.RoundOutputConnector;
+import com.codigoparallevar.minicards.parts.connectors.SignalRoundOutputConnector;
+import com.codigoparallevar.minicards.types.Moveable;
+import com.codigoparallevar.minicards.types.Part;
+import com.codigoparallevar.minicards.types.PartConnection;
+import com.codigoparallevar.minicards.types.PartGrid;
+import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
+import com.codigoparallevar.minicards.types.connectors.output.OutputConnector;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+import com.codigoparallevar.minicards.types.wireData.AnySignal;
+import com.codigoparallevar.minicards.types.wireData.Signal;
+import com.codigoparallevar.minicards.types.wireData.WireDataType;
+import com.codigoparallevar.minicards.ui_helpers.DoAsync;
+import com.programaker.api.ProgramakerApi;
+import com.programaker.api.ProgramakerSignalListener;
+import com.programaker.api.data.ProgramakerCustomBlock;
+import com.programaker.api.data.ProgramakerCustomBlockArgument;
+import com.programaker.api.data.ProgramakerCustomBlockSaveTo;
+import com.programaker.api.data.ProgramakerFunctionCallResult;
+
+import org.jetbrains.annotations.NotNull;
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.UUID;
+
+public class ProgramakerCustomBlockPart implements Part, ProgramakerSignalListener {
+    private static final int WIDTH_PADDING = 50;
+    private static final int HEIGHT_PADDING = 50;
+    private static final int IO_RADIUS = 50;
+    private static final int IO_PADDING = 20;
+    private static final String LogTag = "PM Custom block part";
+
+    private List<Tuple2<ConnectorTypeInfo, ProgramakerCustomBlockInputConnector>> inputConnectors = null;
+    private List<Tuple2<ConnectorTypeInfo, RoundOutputConnector>> outputConnectors = null;
+
+    private final PartGrid _partGrid;
+    private final String _id;
+    private final ProgramakerCustomBlock _block;
+
+    private int _left;
+    private int _top;
+    private int width = 100;
+    private int height = 100;
+    private String token = null;
+    private Object[] lastValues;
+    private boolean active = true;
+    private Tuple2<ConnectorTypeInfo, AnyRoundOutputConnector> saveToOutput;
+    private SignalRoundOutputConnector pulseOutput;
+
+    public ProgramakerCustomBlockPart(String id, PartGrid grid, Tuple2<Integer, Integer> center, ProgramakerCustomBlock block) {
+        this._id = id;
+        this._partGrid = grid;
+        this._block = block;
+
+        this.updateWidthHeight();
+
+        this._left = center.item1 - width / 2;
+        this._top = center.item2 - height / 2;
+        this.initialize();
+    }
+
+    private ProgramakerCustomBlockPart(String id, PartGrid grid, int left, int top, ProgramakerCustomBlock block) {
+        this._id = id;
+        this._partGrid = grid;
+        this._block = block;
+
+        this.updateWidthHeight();
+
+        this._left = left;
+        this._top = top;
+        this.initialize();
+    }
+
+    public ProgramakerCustomBlockPart(PartGrid grid, Tuple2<Integer, Integer> center, ProgramakerCustomBlock block) {
+        this(UUID.randomUUID().toString(), grid, center, block);
+    }
+
+    @Override
+    public int get_left() {
+        return _left;
+    }
+
+    @Override
+    public int get_right() {
+        return _left + width;
+    }
+
+    @Override
+    public int get_top() {
+        return _top;
+    }
+
+    @Override
+    public int get_bottom() {
+        return _top + height;
+    }
+
+    private Paint getTextPaint() {
+        Paint p = new Paint(Paint.ANTI_ALIAS_FLAG);
+        p.setColor(Color.BLACK);
+        p.setTextSize(50);
+        return p;
+    }
+
+    private void updateWidthHeight() {
+        Paint p = getTextPaint();
+        String message = getMessage();
+        Rect bounds = new Rect();
+        p.getTextBounds(message, 0, message.length(), bounds);
+
+        this.height = bounds.height() + HEIGHT_PADDING * 2;
+        this.width = bounds.width() + WIDTH_PADDING * 2;
+    }
+
+    private void initialize() {
+        this.updatePorts();
+        lastValues = new Object[this.inputConnectors.size()];
+    }
+
+    private void updatePorts() {
+        final String type = this._block.getBlock_type() == null ? "" : this._block.getBlock_type();
+        final boolean has_pulse_input = type.equals("operation");
+        final boolean has_pulse_output = has_pulse_input || type.equals("trigger");
+        final boolean hasImplicitOutput = type.equals("getter");
+
+        final List<Tuple2<ConnectorTypeInfo, ProgramakerCustomBlockInputConnector>> inputs = new LinkedList<>();
+        final List<Tuple2<ConnectorTypeInfo, RoundOutputConnector>> outputs = new LinkedList<>();
+
+        SignalRoundOutputConnector pulseOutput = null;
+
+        // Add pulses
+        if (has_pulse_input) {
+            ConnectorTypeInfo typeInfo = new ConnectorTypeInfo(ConnectorTypeInfo.Type.PULSE);
+            inputs.add(new Tuple2<>(typeInfo,
+                    new ProgramakerCustomBlockInputConnector(this, _partGrid,
+                            0, 0,
+                            IO_RADIUS, typeInfo))
+            );
+        }
+        if (has_pulse_output) {
+            pulseOutput = new SignalRoundOutputConnector(this, this._partGrid, 0, 0,
+                    IO_RADIUS);
+            outputs.add(new Tuple2<>(new ConnectorTypeInfo(ConnectorTypeInfo.Type.PULSE),
+                    pulseOutput)
+            );
+        }
+
+        // Add block IO
+        ProgramakerCustomBlockArgument savedTo = null;
+
+        if (_block.getArguments() != null) {
+            ProgramakerCustomBlockSaveTo saveTo = _block.getSave_to();
+            int skip = -1;
+
+            if (saveTo != null) {
+                if (saveTo.getType() != null
+                        && saveTo.getType().equals("argument")) {
+                    skip = saveTo.getIndex();
+                }
+                else {
+                    Log.w(LogTag, "Unknown save-to type=" + saveTo.getType());
+                }
+            }
+
+            int index = -1;
+            for (ProgramakerCustomBlockArgument arg : _block.getArguments()) {
+                index++;
+                if (skip == index) {
+                    savedTo = arg;
+                }
+                else {
+                    ConnectorTypeInfo typeInfo = ConnectorTypeInfo.FromArgument(arg);
+                    inputs.add(new Tuple2<>(typeInfo,
+                            new ProgramakerCustomBlockInputConnector(this, _partGrid,
+                                    0, 0,
+                                    IO_RADIUS, typeInfo)));
+                }
+            }
+        }
+
+        Tuple2<ConnectorTypeInfo, AnyRoundOutputConnector> saveToOutput = null;
+
+        if (savedTo != null) {
+            saveToOutput = new Tuple2<>(ConnectorTypeInfo.FromTypeName(savedTo.getComputedType()),
+                    new AnyRoundOutputConnector(this, this._partGrid, 0, 0, IO_RADIUS));
+            outputs.add(new Tuple2<>(saveToOutput.item1, saveToOutput.item2));
+        }
+
+        if (hasImplicitOutput) {
+            outputs.add(new Tuple2<>(ConnectorTypeInfo.FromTypeName(_block.getBlock_result_type()),
+                    new AnyRoundOutputConnector(this, this._partGrid, 0, 0, IO_RADIUS)));
+        }
+
+        // Tie everything
+        inputConnectors = inputs;
+        outputConnectors = outputs;
+        this.saveToOutput = saveToOutput;
+        this.pulseOutput = pulseOutput;
+
+        this.updatePortPositions();
+    }
+
+    private void updatePortPositions() {
+        {
+            // Update inputs
+            int y = get_top();
+            int x = get_left() + IO_PADDING;
+            for (Tuple2<ConnectorTypeInfo, ProgramakerCustomBlockInputConnector> entry : inputConnectors) {
+                InputConnector input = entry.item2;
+                int new_x = x + IO_PADDING + IO_RADIUS / 2;
+                input.updatePosition(new_x, y);
+                x = x + IO_RADIUS * 2 + IO_PADDING * 2;
+            }
+        }
+        {
+            // Update outputs
+            int y = get_bottom();
+            int x = get_left() + IO_PADDING;
+            for (Tuple2<ConnectorTypeInfo, RoundOutputConnector> entry : outputConnectors) {
+                OutputConnector output = entry.item2;
+                int new_x = x + IO_PADDING + IO_RADIUS / 2;
+                output.updatePosition(new_x, y);
+                x = x + IO_RADIUS * 2 + IO_PADDING * 2;
+            }
+        }
+    }
+
+    private String getMessage() {
+        return this._block.getMessage();
+    }
+
+    @Override
+    public void touched() {
+        Log.i(LogTag, "Part touched (block_fun=" + this._block.getFunction_name() + ")");
+    }
+
+    @Override
+    public List<InputConnector> getInputConnectors() {
+        List<InputConnector> result = new ArrayList<>(inputConnectors.size());
+        for (Tuple2<ConnectorTypeInfo, ProgramakerCustomBlockInputConnector> entry : inputConnectors) {
+            result.add(entry.item2);
+        }
+
+        return result;
+    }
+
+    @Override
+    public List<OutputConnector> getOutputConnectors() {
+        List<OutputConnector> result = new ArrayList<>(outputConnectors.size());
+        for (Tuple2<ConnectorTypeInfo, RoundOutputConnector> entry : outputConnectors) {
+            result.add(entry.item2);
+        }
+
+        return result;
+    }
+
+    @Override
+    public JSONObject serialize() throws JSONException {
+        JSONObject serialized = new JSONObject();
+
+        serialized.put("id", _id);
+        serialized.put("left", _left);
+        serialized.put("top", _top);
+
+        JSONObject blockData = _block.serialize();
+        serialized.put("block", blockData);
+
+        serialized.put("on_string_output_connector", serializeConnectionEndpoints());
+
+        return serialized;
+    }
+
+    private JSONArray serializeConnectionEndpoints() {
+        JSONArray serializedData = new JSONArray();
+
+        for (OutputConnector output : getOutputConnectors()) {
+            JSONArray elements = new JSONArray();
+
+            for (Tuple2<String, String> endpoint : (List<Tuple2<String, String>>) output.getConnectionEndpoints()) {
+                elements.put(PartConnection.serializeToJson(endpoint.item1, endpoint.item2));
+            }
+
+            serializedData.put(elements);
+        }
+        return serializedData;
+    }
+
+    public static Tuple2<Part, List<PartConnection>> deserialize(PartGrid grid, JSONObject data) throws JSONException {
+        String id = data.getString("id");
+        int left = data.getInt("left");
+        int top = data.getInt("top");
+
+        JSONObject el = data.getJSONObject("block");
+        ProgramakerCustomBlock block = ProgramakerCustomBlock.deserialize(el);
+        ProgramakerCustomBlockPart part = new ProgramakerCustomBlockPart(id, grid, left, top, block);
+
+        List<PartConnection> connections = new LinkedList<>();
+
+        JSONArray allConnectorOuts = data.optJSONArray("on_string_output_connector");
+        if (allConnectorOuts == null) {
+            allConnectorOuts = new JSONArray();
+        }
+
+        for (int i = 0; i < allConnectorOuts.length(); i++) {
+            JSONArray connectorOuts = allConnectorOuts.getJSONArray(i);
+            Tuple2<ConnectorTypeInfo, RoundOutputConnector> connector = part.outputConnectors.get(i);
+            for (int j = 0; j < connectorOuts.length(); j++) {
+                connections.add(PartConnection.deserialize(
+                        connector.item2, connectorOuts.getJSONObject(j)));
+            }
+        }
+
+        return new Tuple2<>(part, connections);
+    }
+
+
+    @Override
+    public void send(InputConnector inputConnector, WireDataType signal) {
+        // Log.i(LogTag, "Received signal from Input="+inputConnector);
+        ConnectorTypeInfo info = getConnectorInfo(inputConnector);
+        if (info == null) {
+            Log.e(LogTag, "Unknown connector" + inputConnector);
+            return;
+        }
+
+        if (info.get_type() == ConnectorTypeInfo.Type.PULSE) {
+            wrappedRunOperation();
+        }
+        else {
+            int index = getConnectorIndex(inputConnector);
+            if (index < 0) {
+                return;
+            }
+            this.lastValues[index] = signal.get();
+        }
+    }
+
+    private void wrappedRunOperation() {
+        Log.d(LogTag, "Running block function=" + this._block.getFunction_name());
+        String token = this.prepareStart();
+
+        if (token != null) {
+            try {
+                new DoAsync().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR,
+                        new Tuple2<>(() -> {
+                            ProgramakerCustomBlockPart.this.runBlockOperation();
+
+                            ProgramakerCustomBlockPart.this.freeBlock(token);
+                        }, ex -> {
+                            Log.w(LogTag, "Error executing function=" + this._block.getFunction_name()
+                                    + "; Error=" + ex, ex);
+                            ProgramakerCustomBlockPart.this.freeBlock(token);
+                        }));
+            }
+            catch (Exception ex) {
+                Log.e(LogTag, "Error executing function=" + this._block.getFunction_name()
+                        + "; Error=" + ex, ex);
+                this.freeBlock(token);
+            }
+        } else {
+            // An execution is in progress, so nothing is done
+        }
+    }
+
+    private ProgramakerFunctionCallResult runBlockOperation() {
+        if (!this.active) {
+            Log.w(LogTag, "Trying to run inactive block function=" + this._block.getFunction_name());
+            return null;
+        }
+
+        ProgramakerApi api = this._partGrid.getApi();
+        List<String> arguments = new LinkedList<>();
+
+        int index = -1;
+        for (Tuple2<ConnectorTypeInfo, ProgramakerCustomBlockInputConnector> entry : inputConnectors) {
+            index++;
+            if (entry.item1.get_type() == ConnectorTypeInfo.Type.PULSE) {
+                continue;
+            }
+
+            Object queriedValue = entry.item2.query(lastValues[index]);
+            if (queriedValue != null) {
+                lastValues[index] = queriedValue;
+            }
+
+            if (lastValues[index] == null) {
+                arguments.add(null); // TODO: Get default value from block definition
+            }
+            else {
+                arguments.add(lastValues[index].toString()); // TODO: Do proper type formatting
+            }
+        }
+
+        ProgramakerFunctionCallResult result = api.callBlock(this._block, arguments);
+        Log.i(LogTag, "Execution result="+result.getResult());
+
+        onExecutionCompleted(result);
+
+        return result;
+    }
+
+    private void onExecutionCompleted(ProgramakerFunctionCallResult result) {
+        Tuple2<ConnectorTypeInfo, AnyRoundOutputConnector> savedTo = this.saveToOutput;
+        if (savedTo != null) {
+            Object value = null;
+            if (result != null) {
+                result.getResult();
+            }
+            savedTo.item2.send(new AnySignal(value));
+        }
+
+        SignalRoundOutputConnector pulseOutput = this.pulseOutput;
+        if (pulseOutput != null) {
+            pulseOutput.send(new Signal());
+        }
+
+        // Notify screen that there's updates
+        this._partGrid.update();
+    }
+
+    private void freeBlock(String token) {
+        tryUpdateBlock(token, null);
+    }
+
+    private String prepareStart() {
+        String token = UUID.randomUUID().toString();
+        if (tryUpdateBlock(null, token)) {
+            return token;
+        }
+        return null;
+    }
+
+    private synchronized boolean tryUpdateBlock(String oldVal, String newVal) {
+        if (this.token == oldVal) {
+            this.token = newVal;
+            return true;
+        }
+        return false;
+    }
+
+
+    @Override
+    public String get_id() {
+        return _id;
+    }
+
+    @Override
+    public InputConnector getConnectorWithId(String inputConnectorId) {
+        if (inputConnectorId.startsWith("index=")) {
+            String[] chunks = inputConnectorId.split("=");
+            if (chunks.length > 1) {
+                Integer index = null;
+                try {
+                    index = Integer.parseInt(chunks[1]);
+                }
+                catch (NumberFormatException ex) {
+                    Log.e(LogTag, "Error parsing connector id="+inputConnectorId, ex);
+                }
+
+                if (index != null && index < inputConnectors.size()) {
+                    return inputConnectors.get(index).item2;
+                }
+            }
+        }
+        return null;
+    }
+
+    private int getConnectorIndex(InputConnector inputConnector) {
+        int index = 0;
+        for (Tuple2<ConnectorTypeInfo, ProgramakerCustomBlockInputConnector> entry : inputConnectors) {
+            if (entry.item2 == inputConnector) {
+                return index;
+            }
+            index++;
+        }
+
+        return -1;
+    }
+
+    @Override
+    public String getConnectorId(InputConnector inputConnector) {
+        int index = getConnectorIndex(inputConnector);
+        if (index < 0 ) {
+            return null;
+        }
+
+        return "index=" + index;
+    }
+
+    public ConnectorTypeInfo getConnectorInfo(InputConnector inputConnector) {
+        for (Tuple2<ConnectorTypeInfo, ProgramakerCustomBlockInputConnector> entry : inputConnectors) {
+            if (entry.item2 == inputConnector) {
+                return entry.item1;
+            }
+        }
+
+        return null;
+    }
+
+    @Override
+    public void resume() {
+        this.active = true;
+
+        String type = _block.getBlock_type();
+        if (type != null && (type.equals("trigger"))) {
+            // Listen to signal
+            ProgramakerApi api = _partGrid.getApi();
+            if (api == null) {
+                Log.i(LogTag, "Cannot listen to API. API not found, probably on a showcase.");
+                return;
+            }
+
+            new DoAsync().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR,
+                    new Tuple2<>(
+                            () -> {
+                                _partGrid.getListenerManager().registerSignalListener(
+                                        _block.getBridge_id(), _block.getKey(),
+                                        this);
+                            },
+                            ex -> {
+                                Log.e(LogTag, "Error establishing connection to monitor", ex);
+                            }
+                    ));
+            }
+    }
+
+    @Override
+    public void onNewSignal(@NotNull String bridgeId, @NotNull String key, @NotNull HashMap<?, ?> signal) {
+        // Propagate signal
+        // Stream object on save_to, then trigger pulse
+        Object content = signal.get("content");
+        if (this.saveToOutput != null) {
+            this.saveToOutput.item2.send(new AnySignal(content));
+        }
+
+        if (this.pulseOutput != null) {
+            this.pulseOutput.send(new Signal());
+        }
+        _partGrid.update();
+    }
+
+    @Override
+    public void pause() {
+        this.active = false;
+
+        String type = _block.getBlock_type();
+        if (type != null && (type.equals("trigger"))) {
+            // Release listening of signal
+            ProgramakerApi api = _partGrid.getApi();
+            if (api == null) {
+                return;
+            }
+
+            new DoAsync().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR,
+                    new Tuple2<>(
+                            () -> {
+                                _partGrid.getListenerManager().unregisterSignalListener(this);
+                            },
+                            ex -> {
+                                Log.e(LogTag, "Error disconnecting from monitor", ex);
+                            }
+                    ));
+        }
+    }
+
+    @Override
+    public void draw(ScrolledCanvas canvas, boolean devMode) {
+
+        if (!devMode) {
+            return; // Logic block, don't show on user-mode
+        }
+
+        boolean operationInProgress = this.token != null;
+
+        drawConnectors(canvas);
+        drawWires(canvas, devMode);
+
+        Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        if (operationInProgress) {
+            paint.setColor(Color.YELLOW);
+        }
+        else {
+            paint.setColor(Color.WHITE);
+        }
+        canvas.drawRect(
+                new Rect(get_left(), get_top(),
+                        get_right(), get_bottom()),
+                paint);
+
+        Paint textPaint = getTextPaint();
+        canvas.drawText(getMessage(),
+                get_left() + WIDTH_PADDING,
+                get_bottom() - HEIGHT_PADDING,
+                textPaint);
+    }
+
+    private void drawConnectors(ScrolledCanvas canvas) {
+        if (inputConnectors != null) {
+            for (Tuple2<ConnectorTypeInfo, ProgramakerCustomBlockInputConnector> entry : inputConnectors) {
+                Paint outerInputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+                outerInputConnectorPaint.setColor(entry.item1.getOuterColor());
+
+                canvas.drawCircle(
+                        entry.item2.getX(),
+                        entry.item2.getY(),
+                        entry.item2.getRadius(),
+                        outerInputConnectorPaint);
+
+                Paint innerInputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+                innerInputConnectorPaint.setColor(entry.item1.getInnerColor());
+
+                canvas.drawCircle(
+                        entry.item2.getX(),
+                        entry.item2.getY(),
+                        entry.item2.getRadius() / 2,
+                        innerInputConnectorPaint);
+            }
+        }
+
+        if (outputConnectors != null) {
+            for (Tuple2<ConnectorTypeInfo, RoundOutputConnector> entry : outputConnectors) {
+                Paint outerOutputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+                outerOutputConnectorPaint.setColor(entry.item1.getOuterColor());
+
+                canvas.drawCircle(
+                        entry.item2.getX(),
+                        entry.item2.getY(),
+                        entry.item2.getRadius(),
+                        outerOutputConnectorPaint);
+
+                Paint innerOutputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+                innerOutputConnectorPaint.setColor(entry.item1.getInnerColor());
+
+                canvas.drawCircle(
+                        entry.item2.getX(),
+                        entry.item2.getY(),
+                        entry.item2.getRadius() / 2,
+                        innerOutputConnectorPaint);
+            }
+        }
+    }
+
+    private void drawWires(ScrolledCanvas canvas, boolean devMode) {
+        for (OutputConnector outputConnector : getOutputConnectors()){
+            outputConnector.drawWires(canvas, devMode);
+        }
+    }
+
+    @Override
+    public void moveEnd(int x, int y) {
+        _left = x - width / 2;
+        _top = y - height / 2;
+
+        this.updatePortPositions();
+    }
+
+    @Override
+    public void drop(int x, int y) {
+        moveEnd(x, y);
+    }
+
+    @Override
+    public boolean containsPoint(int x, int y) {
+        return ((x >= this.get_left()) && (x <= this.get_right())
+                && (y >= this.get_top()) && (y <= this.get_bottom()));
+    }
+
+    @Override
+    public Moveable getMoveable() {
+        return this;
+    }
+
+    @Override
+    public void unlink() {
+        pause();
+
+        for (InputConnector input : getInputConnectors()) {
+            input.unlink();
+        }
+    }
+
+    @Override
+    public Object query(Object lastValue) {
+        String blockType = _block.getBlock_type();
+
+        if ((blockType == null) || (!blockType.equals("getter"))) {
+            // Only relevant for getters
+            return null;
+        }
+
+        String token = this.prepareStart();
+
+        if (token != null) {
+            try {
+                _partGrid.update();
+                ProgramakerFunctionCallResult result = runBlockOperation();
+                if (result != null) {
+                    return result.getResult();
+                }
+            }
+            finally {
+                this.freeBlock(token);
+            }
+        }
+
+        return null;
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/parts/android/CameraStreamer.java

@@ -0,0 +1,465 @@
+package com.codigoparallevar.minicards.parts.android;
+
+import android.Manifest;
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.graphics.Color;
+import android.graphics.ImageFormat;
+import android.graphics.Paint;
+import android.graphics.Path;
+import android.graphics.Rect;
+import android.hardware.camera2.CameraAccessException;
+import android.hardware.camera2.CameraCaptureSession;
+import android.hardware.camera2.CameraCharacteristics;
+import android.hardware.camera2.CameraDevice;
+import android.hardware.camera2.CameraManager;
+import android.hardware.camera2.CaptureRequest;
+import android.media.Image;
+import android.media.ImageReader;
+import android.os.Build;
+import android.os.Handler;
+import android.os.HandlerThread;
+import android.util.Log;
+import android.view.Surface;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.RequiresApi;
+
+import com.codigoparallevar.minicards.CanvasView;
+import com.codigoparallevar.minicards.PartInstantiator;
+import com.codigoparallevar.minicards.ScrolledCanvas;
+import com.codigoparallevar.minicards.parts.connectors.ImageRoundOutputConnector;
+import com.codigoparallevar.minicards.parts.style.CardTheme;
+import com.codigoparallevar.minicards.types.Moveable;
+import com.codigoparallevar.minicards.types.Part;
+import com.codigoparallevar.minicards.types.PartConnection;
+import com.codigoparallevar.minicards.types.PartGrid;
+import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
+import com.codigoparallevar.minicards.types.connectors.output.OutputConnector;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+import com.codigoparallevar.minicards.types.wireData.ImageSignal;
+import com.codigoparallevar.minicards.types.wireData.WireDataType;
+import com.codigoparallevar.minicards.utils.Serializations;
+
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+
+@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
+public class CameraStreamer implements Part {
+    private static final String LogTag = "CameraStreamer";
+
+    private static final int DEFAULT_SIDE_SIZE = 200;
+    private final String _id;
+    private final PartGrid _partGrid;
+    private int _left;
+    private int _top;
+    private int _right;
+    private int _bottom;
+    private List<OutputConnector> _outputConnectors;
+    private final ImageRoundOutputConnector _imageRoundOutputConnector;
+    private final long SLEEP_TIME = 1000;
+    private ImageReader imageReader = null;
+    private HandlerThread _thread = null;
+    private Handler _handler = null;
+    private static final int CAPTURE_IMAGE_WIDTH = 256;
+    private static final int CAPTURE_IMAGE_HEIGHT = 256;
+
+    private CameraStreamer(String id, PartGrid partGrid, int left, int top, int right, int bottom) {
+        _id = id;
+        _partGrid = partGrid;
+        _left = left;
+        _top = top;
+        _right = right;
+        _bottom = bottom;
+
+        // Create connectors
+        _imageRoundOutputConnector = new ImageRoundOutputConnector(
+                this,
+                _partGrid,
+                getOutputConnectorCenterX(), getOutputConnectorCenterY(),
+                getOutputConnectRadius());
+
+        _outputConnectors = new LinkedList<>();
+        _outputConnectors.add(_imageRoundOutputConnector);
+    }
+
+
+    public CameraStreamer(PartGrid partGrid, int left, int top, int right, int bottom) {
+        this(UUID.randomUUID().toString(), partGrid, left, top, right, bottom);
+    }
+
+
+    @Override
+    public void moveEnd(int x, int y) {
+        final int width = _right - _left;
+        final int height = _bottom - _top;
+
+        _left = x - width / 2;
+        _right = _left + width;
+
+        _top = y - height / 2;
+        _bottom = _top + height;
+
+        _imageRoundOutputConnector.updatePosition(
+                getOutputConnectorCenterX(),
+                getOutputConnectorCenterY());
+    }
+
+    @Override
+    public void drop(int x, int y) {
+        moveEnd(x, y);
+    }
+
+    @Override
+    public boolean containsPoint(int x, int y) {
+        return (x >= get_left()) && (x <= get_right())
+                && (y >= get_top()) && (y <= get_bottom());
+    }
+
+    @Override
+    public Moveable getMoveable() {
+        return this;
+    }
+
+    @Override
+    public void unlink() {
+        pause();
+
+        for (InputConnector input : getInputConnectors()) {
+            input.unlink();
+        }
+    }
+
+    @Override
+    public void draw(ScrolledCanvas canvas, boolean devMode) {
+        if (devMode){
+            drawConnector(canvas);
+            drawWires(canvas, devMode);
+
+            Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
+            paint.setColor(Color.GRAY);
+
+            canvas.drawRect(
+                    new Rect(_left, _top,
+                            _right, _bottom),
+                    paint);
+
+
+            // Draw a little camera
+            Paint iconPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+            iconPaint.setStyle(Paint.Style.STROKE);
+            iconPaint.setColor(Color.YELLOW);
+            iconPaint.setStrokeWidth(5f);
+            iconPaint.setStrokeCap(Paint.Cap.ROUND);
+            iconPaint.setStrokeJoin(Paint.Join.ROUND);
+
+            // TODO: Refactor this into something reasonable
+            float side = _right - _left;
+            float mid = side / 2;
+            float quarter = mid / 2;
+            float oct = quarter / 2;
+            float hex = oct / 2;
+            float shex = hex / 2;
+
+            Path path = new Path();
+            // Square top left
+            path.moveTo(_left + oct + hex + shex, _top + quarter + hex);
+            // Square top right
+            path.lineTo(_left + mid + hex + shex, _top + quarter + hex);
+            // Box-to-projection connection
+            path.lineTo(_left + mid + hex + shex, _top + mid);
+            // Projection top right
+            path.lineTo(_right - quarter - hex + hex + shex, _top + quarter + hex);
+            // Projection bottom right
+            path.lineTo(_right - quarter - hex + hex + shex, _bottom - quarter - hex);
+            // Back to box
+            path.lineTo(_left + mid + hex + shex, _top + mid);
+            // Box bottom right
+            path.lineTo(_left + mid + hex + shex, _bottom - quarter - hex);
+            // Box bottom left
+            path.lineTo(_left + oct + hex + shex, _bottom - quarter - hex);
+
+            path.close();
+            canvas.drawPath(path, iconPaint);
+        }
+    }
+
+    private void drawConnector(ScrolledCanvas canvas) {
+        Paint outerConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        outerConnectorPaint.setColor(CardTheme.IMAGE_CONNECTOR_COLOR_OUTER);
+
+        canvas.drawCircle(getOutputConnectorCenterX(),
+                getOutputConnectorCenterY(),
+                getOutputConnectRadius(),
+                outerConnectorPaint);
+
+        Paint innerConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        innerConnectorPaint.setColor(CardTheme.IMAGE_CONNECTOR_COLOR_INNER);
+
+        canvas.drawCircle(getOutputConnectorCenterX(),
+                getOutputConnectorCenterY(),
+                getOutputConnectRadius() / 2,
+                innerConnectorPaint);
+    }
+
+    private void drawWires(ScrolledCanvas canvas, boolean devMode) {
+        for (OutputConnector outputConnector : _outputConnectors){
+            outputConnector.drawWires(canvas, devMode);
+        }
+    }
+
+    @Override
+    public int get_left() {
+        return _left;
+    }
+
+    @Override
+    public int get_right() {
+        return _right;
+    }
+
+    @Override
+    public int get_top() {
+        return _top;
+    }
+
+    @Override
+    public int get_bottom() {
+        return _bottom;
+    }
+
+    @Override
+    public void touched() {
+        // Just ignore it, as it's a logic component
+    }
+
+    @Override
+    public List<InputConnector> getInputConnectors() {
+        return Collections.emptyList();
+    }
+
+    @Override
+    public List<OutputConnector> getOutputConnectors() {
+        return _outputConnectors;
+    }
+
+    @Override
+    public JSONObject serialize() throws JSONException {
+        JSONObject serialized = new JSONObject();
+
+        serialized.put("id", _id);
+        serialized.put("left", _left);
+        serialized.put("top", _top);
+        serialized.put("right", _right);
+        serialized.put("bottom", _bottom);
+        serialized.put("on_signal_output_connector",
+                Serializations.serialize(serializeConnectionEndpoints()));
+
+        return serialized;
+    }
+
+    public static Tuple2<Part, List<PartConnection>> deserialize(PartGrid partGrid, JSONObject data) throws JSONException {
+        String id = data.getString("id");
+        int left = data.getInt("left");
+        int top = data.getInt("top");
+        int right = data.getInt("right");
+        int bottom = data.getInt("bottom");
+
+        CameraStreamer cameraStreamer = new CameraStreamer(id, partGrid, left, top, right, bottom);
+
+        List<PartConnection> connections = new LinkedList<>();
+
+        JSONArray connectorOuts = data.getJSONArray("on_signal_output_connector");
+        for (int i = 0; i < connectorOuts.length(); i++){
+            connections.add(PartConnection.deserialize(
+                    cameraStreamer._imageRoundOutputConnector,
+                    connectorOuts.getJSONObject(i)));
+        }
+
+        return new Tuple2<Part, List<PartConnection>>(cameraStreamer, connections);
+    }
+
+    private List<Map<String, String>> serializeConnectionEndpoints() {
+        List<Map<String, String>> serializedData = new LinkedList<>();
+
+        for (Tuple2<String, String> endpoint : _imageRoundOutputConnector.getConnectionEndpoints()){
+            serializedData.add(PartConnection.serialize(endpoint.item1, endpoint.item2));
+        }
+
+        return serializedData;
+    }
+
+    @Override
+    public void send(InputConnector roundInputConnector, WireDataType signal) {
+        // @TODO: REMOVE THE NEED FOR THIS
+    }
+
+    private void onNewImage(Image img) {
+        _imageRoundOutputConnector.send(new ImageSignal(img));
+    }
+
+    @Override
+    public String get_id() {
+        return _id;
+    }
+
+    @Override
+    public InputConnector getConnectorWithId(String inputConnectorId) {
+        return null;
+    }
+
+    @Override
+    public String getConnectorId(InputConnector inputConnector) {
+        return null;
+    }
+
+    @Override
+    public void resume()  {
+        if (!(this._partGrid instanceof CanvasView)) {
+            return;
+        }
+
+        CanvasView view = ((CanvasView) this._partGrid);
+        Context ctx = view.getContext();
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            if (ctx.checkSelfPermission(Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
+                view.requestPermission(Manifest.permission.CAMERA, () -> { CameraStreamer.this.resume(); });
+                return;
+            }
+        }
+
+        this.imageReader = ImageReader.newInstance(CAPTURE_IMAGE_WIDTH, CAPTURE_IMAGE_HEIGHT, ImageFormat.JPEG, 30);
+        this.imageReader.setOnImageAvailableListener((ImageReader.OnImageAvailableListener) newImageReader -> {
+            Image latestImage = newImageReader.acquireLatestImage();
+
+            if (latestImage == null) {
+                return;
+            }
+
+            CameraStreamer.this.onNewImage(latestImage);
+            latestImage.close();
+        }, new Handler());
+
+        CameraManager cm = (CameraManager) ctx.getSystemService(Context.CAMERA_SERVICE);
+        try {
+            String[] cameraList = cm.getCameraIdList();
+            for (String cd : cameraList) {
+                //get camera characteristics
+                CameraCharacteristics mCameraCharacteristics = cm.getCameraCharacteristics(cd);
+
+                //check if the camera is in the back - if not, continue to next
+                if (mCameraCharacteristics.get(CameraCharacteristics.LENS_FACING) != CameraCharacteristics.LENS_FACING_BACK) {
+                    continue;
+                }
+
+                if (this._thread == null) {
+                    this._thread = new HandlerThread("mCameraHandlerThread");
+                    this._thread.start();
+                }
+                if (this._handler == null) {
+                    this._handler = new Handler(this._thread.getLooper());
+                }
+
+                cm.openCamera(cd, new CameraDevice.StateCallback() {
+                    @Override
+                    public void onOpened(@NonNull CameraDevice camera) {
+                        //make list of surfaces to give to camera
+                        List<Surface> surfaceList = new ArrayList<>();
+                        Surface surface = CameraStreamer.this.imageReader.getSurface();
+                        surfaceList.add(surface);
+
+                        try {
+                            camera.createCaptureSession(surfaceList, new CameraCaptureSession.StateCallback() {
+                                @Override
+                                public void onConfigured(@NonNull CameraCaptureSession session) {
+                                    try {
+                                        CaptureRequest.Builder requestBuilder = session.getDevice().createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
+                                        requestBuilder.set(CaptureRequest.JPEG_ORIENTATION, mCameraCharacteristics.get(CameraCharacteristics.SENSOR_ORIENTATION));
+                                        requestBuilder.addTarget(surface);
+                                        //set to null - image data will be produced but will not receive metadata
+                                        session.setRepeatingRequest(requestBuilder.build(), null, CameraStreamer.this._handler);
+                                    } catch (CameraAccessException e) {
+                                        Log.e(LogTag, "createCaptureSession threw CameraAccessException.", e);
+                                    }
+                                }
+
+                                @Override
+                                public void onConfigureFailed(@NonNull CameraCaptureSession session) {
+                                    Log.i(LogTag, "Error on camera configuration");
+                                }
+                            }, CameraStreamer.this._handler);
+                        } catch (CameraAccessException e) {
+                            Log.e(LogTag, "createCaptureSession threw CameraAccessException.", e);
+                        }
+                    }
+
+                    @Override
+                    public void onDisconnected(@NonNull CameraDevice camera) {
+                        Log.i(LogTag, "Camera disconnected");
+                    }
+
+                    @Override
+                    public void onError(@NonNull CameraDevice camera, int error) {
+                        Log.i(LogTag, "Error on camera opening: " + error);
+                    }
+                }, this._handler);
+                break;
+            }
+
+        } catch (CameraAccessException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public void pause() {
+        this._handler = null;
+        if (this._thread != null) {
+            this._thread.interrupt();
+            this._thread = null;
+        }
+        if (this.imageReader != null) {
+            this.imageReader.close();
+            this.imageReader = null;
+        }
+    }
+
+    @Override
+    public Object query(Object lastValue) {
+        return null; // No relevant value (maybe time?)
+    }
+
+
+    private int getOutputConnectorCenterX() {
+        return (_left + _right) / 2;
+    }
+
+    private int getOutputConnectorCenterY() {
+        return _bottom;
+    }
+
+    private int getOutputConnectRadius() {
+        return (_right - _left) / 2;
+    }
+
+    public static PartInstantiator getInstantiator() {
+        final int halfSideSize = DEFAULT_SIDE_SIZE / 2;
+        return new PartInstantiator() {
+            @Override
+            protected Part instantiate(PartGrid grid, Tuple2<Integer, Integer> center) {
+                return new CameraStreamer(grid,
+                        center.item1 - halfSideSize, center.item2 - halfSideSize,
+                        center.item1 + halfSideSize, center.item2 + halfSideSize);
+            }
+        };
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/parts/buttons/RoundButton.java

@@ -6,12 +6,13 @@ import android.util.Log;
 
 import com.codigoparallevar.minicards.PartInstantiator;
 import com.codigoparallevar.minicards.ScrolledCanvas;
-import com.codigoparallevar.minicards.parts.connectors.RoundOutputConnector;
+import com.codigoparallevar.minicards.parts.connectors.SignalRoundOutputConnector;
+import com.codigoparallevar.minicards.parts.style.CardTheme;
 import com.codigoparallevar.minicards.types.Moveable;
 import com.codigoparallevar.minicards.types.Part;
 import com.codigoparallevar.minicards.types.PartConnection;
 import com.codigoparallevar.minicards.types.PartGrid;
-import com.codigoparallevar.minicards.types.Tuple2;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
 import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
 import com.codigoparallevar.minicards.types.connectors.output.OutputConnector;
 import com.codigoparallevar.minicards.types.wireData.Signal;
@@ -38,7 +39,7 @@ public class RoundButton implements Part {
     private final int _outerRadiusThickness = 10;
     private final int _pathRunWay = 200;
     private List<OutputConnector> _outputConnectors;
-    private final RoundOutputConnector _pressedOutputConnector;
+    private final SignalRoundOutputConnector _pressedOutputConnector;
     private final static int DEFAULT_INNER_RADIUS = 80;
     private final static int DEFAULT_OUTER_RADIUS = 100;
 
@@ -53,7 +54,7 @@ public class RoundButton implements Part {
         _outerRadius = outerRadius;
 
         // Create connectors
-        _pressedOutputConnector = new RoundOutputConnector(
+        _pressedOutputConnector = new SignalRoundOutputConnector(
                 this,
                 _partGrid,
                 getOutputConnectorCenterX(), getOutputConnectorCenterY(),
@@ -69,22 +70,22 @@ public class RoundButton implements Part {
 
     @Override
     public int get_left() {
-        return _xCenter - _outerRadius / 2;
+        return _xCenter - _outerRadius;
     }
 
     @Override
     public int get_right() {
-        return _xCenter + _outerRadius / 2;
+        return _xCenter + _outerRadius;
     }
 
     @Override
     public int get_top() {
-        return _yCenter - _outerRadius / 2;
+        return _yCenter - _outerRadius;
     }
 
     @Override
     public int get_bottom() {
-        return _yCenter + _outerRadius / 2;
+        return _yCenter + _outerRadius;
     }
 
     @Override
@@ -106,20 +107,27 @@ public class RoundButton implements Part {
     }
 
     private void drawConnector(ScrolledCanvas canvas) {
-        Paint connectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
-        connectorPaint.setColor(Color.RED);
+        Paint outerConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        outerConnectorPaint.setColor(CardTheme.PULSE_CONNECTOR_COLOR_OUTER);
 
         canvas.drawCircle(getOutputConnectorCenterX(), getOutputConnectorCenterY(),
                 getOutputConnectRadius(),
-                connectorPaint);
+                outerConnectorPaint);
+
+        Paint innerConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        innerConnectorPaint.setColor(CardTheme.PULSE_CONNECTOR_COLOR_INNER);
+
+        canvas.drawCircle(getOutputConnectorCenterX(), getOutputConnectorCenterY(),
+                getOutputConnectRadius() / 2,
+                innerConnectorPaint);
     }
 
     private int getOutputConnectorCenterX() {
-        return _xCenter + _outerRadius;
+        return _xCenter;
     }
 
     private int getOutputConnectorCenterY() {
-        return _yCenter;
+        return _yCenter +  _outerRadius;
     }
 
     private int getOutputConnectRadius() {
@@ -221,7 +229,12 @@ public class RoundButton implements Part {
 
     }
 
-    public RoundOutputConnector getPressedOutputConnector(){
+    @Override
+    public Object query(Object lastValue) {
+        return null; // Only pulse output, so no relevant data
+    }
+
+    public SignalRoundOutputConnector getPressedOutputConnector(){
         return _pressedOutputConnector;
     }
 

app/src/main/java/com/codigoparallevar/minicards/parts/connectors/AnyRoundOutputConnector.java

@@ -0,0 +1,196 @@
+package com.codigoparallevar.minicards.parts.connectors;
+
+import android.util.Log;
+
+import com.codigoparallevar.minicards.ScrolledCanvas;
+import com.codigoparallevar.minicards.types.Drawable;
+import com.codigoparallevar.minicards.types.Part;
+import com.codigoparallevar.minicards.types.PartGrid;
+import com.codigoparallevar.minicards.types.connectors.Wiring.AnyWire;
+import com.codigoparallevar.minicards.types.connectors.input.AnyInputConnector;
+import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
+import com.codigoparallevar.minicards.types.connectors.output.AnyOutputConnector;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+import com.codigoparallevar.minicards.types.wireData.AnySignal;
+
+import java.util.HashSet;
+import java.util.LinkedList;
+import java.util.List;
+
+public class AnyRoundOutputConnector implements Drawable, AnyOutputConnector,
+        RoundOutputConnector<AnySignal, AnyInputConnector, AnyWire> {
+    private PartGrid _partGrid;
+    private int _centerX;
+    private int _centerY;
+    private final int _radius;
+    private final Part _part;
+    private AnyWire _currentWire = null;
+    private final List<AnyWire> _wires;
+    private final HashSet<InputConnector> _connections;
+
+    public AnyRoundOutputConnector(Part part, PartGrid partGrid, int centerX, int centerY, int radius) {
+        _part = part;
+        _partGrid = partGrid;
+        _centerX = centerX;
+        _centerY = centerY;
+        _radius = radius;
+        _wires = new LinkedList<>();
+        _connections = new HashSet<>();
+    }
+
+    @Override
+    public boolean containsPoint(int x, int y) {
+        return ((Math.abs(x - _centerX) <= _radius)
+                && (Math.abs(y - _centerY) <= _radius));
+    }
+
+
+    @Override
+    public AnyWire getMoveable() {
+        if (_currentWire == null) {
+            startWire();
+        }
+
+        return _currentWire;
+    }
+
+    @Override
+    public void unlink() {
+        while (_wires.size() > 0) {
+            _wires.get(0).unlink();
+        }
+    }
+
+    private void startWire() {
+        _currentWire = new AnyWire(this, _centerX, _centerY);
+    }
+
+    public void drop(AnyWire wire, AnyInputConnector resultPoint) {
+        if (wire != _currentWire) {
+            Log.w("RoundOutputConnector",
+                    "Asked to drop non matching wire "
+                            + "(expected " + _currentWire + ", got " + wire + ")");
+            return ;
+        }
+
+        _currentWire = null;
+
+        Log.d("RoundOutputConnector", "Dropped wire on " + resultPoint);
+
+        // Not connected
+        if (resultPoint == null) {
+            return;
+        }
+
+        // Already connected
+        if (_connections.contains(resultPoint)) {
+            return;
+        }
+        _connections.add(resultPoint);
+
+        wire.attachTo(resultPoint, this);
+        _wires.add(wire);
+    }
+
+    @Override
+    public void drop(AnyWire wire) {
+
+        if (wire != _currentWire) {
+            Log.w("RoundOutputConnector",
+                    "Asked to drop non matching wire "
+                            + "(expected " + _currentWire + ", got " + wire + ")");
+            return;
+        }
+
+        AnyInputConnector resultPoint = _partGrid.getAnyInputConnectorOn(
+                wire.getXEnd(), wire.getYEnd());
+
+        drop(wire, resultPoint);
+    }
+
+    @Override
+    public void wireUnlinked(AnyWire wire) {
+        _wires.remove(wire);
+        _connections.remove(wire.getAttachedTo());
+    }
+
+    @Override
+    public void drawWires(ScrolledCanvas canvas, boolean devMode) {
+        for (AnyWire wire : _wires) {
+            wire.draw(canvas, devMode);
+        }
+
+        if (_currentWire != null) {
+            _currentWire.draw(canvas, devMode);
+        }
+    }
+
+    @Override
+    public void updatePosition(int x, int y) {
+        _centerX = x;
+        _centerY = y;
+
+        for (AnyWire wire : _wires){
+            wire.moveStart(x, y);
+        }
+    }
+
+    @Override
+    public List<Tuple2<String, String>> getConnectionEndpoints() {
+        List<Tuple2<String, String>> endpointIds = new LinkedList<>();
+
+        for (AnyWire wire : _wires) {
+            InputConnector inputConnector = wire.getAttachedTo();
+            Part endPart = inputConnector.getPart();
+            endpointIds.add(new Tuple2<>(inputConnector.getId(), endPart.get_id()));
+        }
+
+        return endpointIds;
+    }
+
+    @Override
+    public void connectTo(AnyInputConnector inputConnector) {
+        if (_connections.contains(inputConnector)) {
+            return;
+        }
+
+        _connections.add(inputConnector);
+
+        AnyWire wire = new AnyWire(this, _centerX, _centerY);
+        wire.attachTo(inputConnector, this);
+        _wires.add(wire);
+    }
+
+    @Override
+    public void draw(ScrolledCanvas canvas, boolean devMode) {
+        // TODO: Complete this part
+    }
+
+    public void send(AnySignal signal) {
+        for (AnyWire wire : _wires){
+            wire.send(signal);
+        }
+    }
+
+    @Override
+    public Object query(Object lastValue) {
+        return _part.query(lastValue);
+    }
+
+    @Override
+    public List<AnyWire> getWires() {
+        return _wires;
+    }
+
+    public int getX() {
+        return _centerX;
+    }
+
+    public int getY() {
+        return _centerY;
+    }
+
+    public float getRadius() {
+        return _radius;
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/parts/connectors/BooleanRoundInputConnector.java

@@ -72,7 +72,7 @@ public class BooleanRoundInputConnector implements BooleanInputConnector {
 
 
     @Override
-    public void getAttachment(Wire<BooleanSignal, BooleanInputConnector> wire) {
+    public void addAttachment(Wire<BooleanSignal, BooleanInputConnector> wire) {
         _attachments.add(wire);
     }
 
@@ -92,7 +92,7 @@ public class BooleanRoundInputConnector implements BooleanInputConnector {
     }
 
     @Override
-    public void unlinkWire(Wire wire) {
+    public void wireUnlinked(Wire wire) {
         _attachments.remove(wire);
     }
 }

app/src/main/java/com/codigoparallevar/minicards/parts/connectors/BooleanRoundOutputConnector.java

@@ -7,11 +7,11 @@ import com.codigoparallevar.minicards.types.Drawable;
 import com.codigoparallevar.minicards.types.Moveable;
 import com.codigoparallevar.minicards.types.Part;
 import com.codigoparallevar.minicards.types.PartGrid;
-import com.codigoparallevar.minicards.types.Tuple2;
 import com.codigoparallevar.minicards.types.connectors.Wiring.BooleanWire;
 import com.codigoparallevar.minicards.types.connectors.input.BooleanInputConnector;
 import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
 import com.codigoparallevar.minicards.types.connectors.output.BooleanOutputConnector;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
 import com.codigoparallevar.minicards.types.wireData.BooleanSignal;
 
 import java.util.HashSet;
@@ -83,7 +83,7 @@ public class BooleanRoundOutputConnector implements Drawable, BooleanOutputConne
             }
             _connections.add(resultPoint);
 
-            wire.attachTo(resultPoint);
+            wire.attachTo(resultPoint, this);
             _wires.add(wire);
         }
         else {
@@ -94,8 +94,9 @@ public class BooleanRoundOutputConnector implements Drawable, BooleanOutputConne
     }
 
     @Override
-    public void unlinkWire(BooleanWire wire) {
+    public void wireUnlinked(BooleanWire wire) {
         _wires.remove(wire);
+        _connections.remove(wire.getAttachedTo());
     }
 
     @Override
@@ -141,7 +142,7 @@ public class BooleanRoundOutputConnector implements Drawable, BooleanOutputConne
         _connections.add(inputConnector);
 
         BooleanWire wire = new BooleanWire(this, _centerX, _centerY);
-        wire.attachTo(inputConnector);
+        wire.attachTo(inputConnector, this);
         _wires.add(wire);
     }
 
@@ -155,4 +156,14 @@ public class BooleanRoundOutputConnector implements Drawable, BooleanOutputConne
             wire.send(signal);
         }
     }
+
+    @Override
+    public Object query(Object lastValue) {
+        return _part.query(lastValue);
+    }
+
+    @Override
+    public List<BooleanWire> getWires() {
+        return _wires;
+    }
 }

app/src/main/java/com/codigoparallevar/minicards/parts/connectors/ConnectorTypeInfo.java

@@ -0,0 +1,172 @@
+package com.codigoparallevar.minicards.parts.connectors;
+
+import com.codigoparallevar.minicards.parts.style.CardTheme;
+import com.programaker.api.data.ProgramakerCustomBlockArgument;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+
+public class ConnectorTypeInfo {
+    private final Type _type;
+    private static final String SERIALIZED_TYPE_KEY = "type";
+    private static final String SERIALIZED_ARGUMENT_KEY = "argument";
+
+    private ProgramakerCustomBlockArgument _blockArgument = null;
+
+    public static ConnectorTypeInfo FromTypeName(String type) {
+        if (type == null) {
+            return new ConnectorTypeInfo(Type.UNKNOWN);
+        }
+
+        type = type.toLowerCase();
+        if (type.equals("string")) {
+            return new ConnectorTypeInfo(Type.STRING);
+        }
+        else if (type.equals("integer")) {
+            return new ConnectorTypeInfo(Type.INTEGER);
+        }
+        else if (type.equals("float")) {
+            return new ConnectorTypeInfo(Type.FLOAT);
+        }
+        else if (type.equals("boolean")) {
+            return new ConnectorTypeInfo(Type.BOOLEAN);
+        }
+        else if (type.equals("pulse")) {
+            return new ConnectorTypeInfo(Type.PULSE);
+        }
+        else if (type.equals("enum")) {
+            return new ConnectorTypeInfo(Type.ENUM);
+        }
+        else if (type.equals("any")) {
+            return new ConnectorTypeInfo(Type.ANY);
+        }
+        else {
+            return new ConnectorTypeInfo(Type.UNKNOWN);
+        }
+    }
+
+
+    private static String typeToString(Type type) {
+        switch (type) {
+            case ANY:
+                return "any";
+            case ENUM:
+                return "enum";
+            case FLOAT:
+                return "float";
+            case PULSE:
+                return "pulse";
+            case STRING:
+                return "string";
+            case BOOLEAN:
+                return "boolean";
+            case INTEGER:
+                return "integer";
+            case UNKNOWN:
+                return "unknown";
+            default:
+                return "unknown";
+        }
+    }
+
+    public static ConnectorTypeInfo deserialize(JSONObject jsonTypeInfo) {
+        ConnectorTypeInfo type = ConnectorTypeInfo.FromTypeName(jsonTypeInfo.optString(SERIALIZED_TYPE_KEY));
+
+        JSONObject arg = jsonTypeInfo.optJSONObject(SERIALIZED_ARGUMENT_KEY);
+        if (arg != null) {
+            type._blockArgument = ProgramakerCustomBlockArgument.deserialize(arg);
+        }
+
+        return type;
+    }
+
+    public static ConnectorTypeInfo FromArgument(ProgramakerCustomBlockArgument arg) {
+        ConnectorTypeInfo type = ConnectorTypeInfo.FromTypeName(arg.getComputedType());
+        type._blockArgument = arg;
+        return type;
+    }
+
+    public int getOuterColor() {
+        switch (_type) {
+            case ANY:
+                return CardTheme.ANY_CONNECTOR_COLOR_OUTER;
+            case ENUM:
+                return CardTheme.ENUM_CONNECTOR_COLOR_OUTER;
+            case FLOAT:
+                return CardTheme.FLOAT_CONNECTOR_COLOR_OUTER;
+            case PULSE:
+                return CardTheme.PULSE_CONNECTOR_COLOR_OUTER;
+            case STRING:
+                return CardTheme.STRING_CONNECTOR_COLOR_OUTER;
+            case BOOLEAN:
+                return CardTheme.BOOLEAN_CONNECTOR_COLOR_OUTER;
+            case INTEGER:
+                return CardTheme.INTEGER_CONNECTOR_COLOR_OUTER;
+            case UNKNOWN:
+                return CardTheme.UNKNOWN_CONNECTOR_COLOR_OUTER;
+            default:
+                return CardTheme.UNKNOWN_CONNECTOR_COLOR_OUTER;
+        }
+    }
+
+
+    public int getInnerColor() {
+        switch (_type) {
+            case ANY:
+                return CardTheme.ANY_CONNECTOR_COLOR_INNER;
+            case ENUM:
+                return CardTheme.ENUM_CONNECTOR_COLOR_INNER;
+            case FLOAT:
+                return CardTheme.FLOAT_CONNECTOR_COLOR_INNER;
+            case PULSE:
+                return CardTheme.PULSE_CONNECTOR_COLOR_INNER;
+            case STRING:
+                return CardTheme.STRING_CONNECTOR_COLOR_INNER;
+            case BOOLEAN:
+                return CardTheme.BOOLEAN_CONNECTOR_COLOR_INNER;
+            case INTEGER:
+                return CardTheme.INTEGER_CONNECTOR_COLOR_INNER;
+            case UNKNOWN:
+                return CardTheme.UNKNOWN_CONNECTOR_COLOR_INNER;
+            default:
+                return CardTheme.UNKNOWN_CONNECTOR_COLOR_INNER;
+        }
+    }
+
+    public JSONObject serialize() {
+        JSONObject obj = new JSONObject();
+        try {
+            obj.put(SERIALIZED_TYPE_KEY, ConnectorTypeInfo.typeToString(this._type));
+
+            if (_blockArgument != null) {
+                obj.put(SERIALIZED_ARGUMENT_KEY, _blockArgument.serialize());
+            }
+        } catch (JSONException e) {
+            e.printStackTrace();
+        }
+        return obj;
+    }
+
+    public ProgramakerCustomBlockArgument getBlockArgument() {
+        return _blockArgument;
+    }
+
+    public enum Type {
+        PULSE,
+        BOOLEAN,
+        STRING,
+        ANY,
+        ENUM,
+        UNKNOWN,
+        FLOAT,
+        INTEGER,
+    }
+
+    public ConnectorTypeInfo(ConnectorTypeInfo.Type type) {
+        this._type = type;
+    }
+
+    public Type get_type() {
+        return _type;
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/parts/connectors/ImageRoundInputConnector.java

@@ -5,22 +5,22 @@ import android.util.Log;
 import com.codigoparallevar.minicards.types.Moveable;
 import com.codigoparallevar.minicards.types.Part;
 import com.codigoparallevar.minicards.types.connectors.Wiring.Wire;
-import com.codigoparallevar.minicards.types.connectors.input.AnyInputConnector;
-import com.codigoparallevar.minicards.types.wireData.WireDataType;
+import com.codigoparallevar.minicards.types.connectors.input.ImageInputConnector;
+import com.codigoparallevar.minicards.types.wireData.ImageSignal;
 
 import java.util.LinkedList;
 import java.util.List;
 
-public class AnyRoundInputConnector extends AnyInputConnector {
+public class ImageRoundInputConnector implements ImageInputConnector {
     private final Part _part;
     private int _xposition;
     private int _yposition;
     private final int _radius;
     private final List<Wire> _attachments = new LinkedList<>();
 
-    public AnyRoundInputConnector(Part part,
-                                  int inputConnectorCenterX, int inputConnectorCenterY,
-                                  int inputConnectorRadius) {
+    public ImageRoundInputConnector(Part part,
+                                    int inputConnectorCenterX, int inputConnectorCenterY,
+                                    int inputConnectorRadius) {
         _part = part;
         _xposition = inputConnectorCenterX;
         _yposition = inputConnectorCenterY;
@@ -66,13 +66,13 @@ public class AnyRoundInputConnector extends AnyInputConnector {
     }
 
     @Override
-    public void send(WireDataType signal) {
+    public void send(ImageSignal signal) {
         _part.send(this, signal);
     }
 
 
     @Override
-    public void getAttachment(Wire wire) {
+    public void addAttachment(Wire<ImageSignal, ImageInputConnector> wire) {
         _attachments.add(wire);
     }
 
@@ -92,7 +92,7 @@ public class AnyRoundInputConnector extends AnyInputConnector {
     }
 
     @Override
-    public void unlinkWire(Wire wire) {
+    public void wireUnlinked(Wire wire) {
         _attachments.remove(wire);
     }
 }

app/src/main/java/com/codigoparallevar/minicards/parts/connectors/ImageRoundOutputConnector.java

@@ -0,0 +1,183 @@
+package com.codigoparallevar.minicards.parts.connectors;
+
+import android.util.Log;
+
+import com.codigoparallevar.minicards.ScrolledCanvas;
+import com.codigoparallevar.minicards.types.Drawable;
+import com.codigoparallevar.minicards.types.Moveable;
+import com.codigoparallevar.minicards.types.Part;
+import com.codigoparallevar.minicards.types.PartGrid;
+import com.codigoparallevar.minicards.types.connectors.Wiring.ImageWire;
+import com.codigoparallevar.minicards.types.connectors.input.ImageInputConnector;
+import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
+import com.codigoparallevar.minicards.types.connectors.output.ImageOutputConnector;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+import com.codigoparallevar.minicards.types.wireData.ImageSignal;
+
+import java.util.HashSet;
+import java.util.LinkedList;
+import java.util.List;
+
+public class ImageRoundOutputConnector implements Drawable, ImageOutputConnector,
+        RoundOutputConnector<ImageSignal, ImageInputConnector, ImageWire> {
+    private static final String LogTag = "ImageRoundOutputConnector";
+
+    private PartGrid _partGrid;
+    private int _centerX;
+    private int _centerY;
+    private final int _radius;
+    private final Part _part;
+    private ImageWire _currentWire = null;
+    private final List<ImageWire> _wires;
+    private final HashSet<InputConnector> _connections;
+
+    public ImageRoundOutputConnector(Part part, PartGrid partGrid, int centerX, int centerY, int radius) {
+        _part = part;
+        _partGrid = partGrid;
+        _centerX = centerX;
+        _centerY = centerY;
+        _radius  = radius;
+        _wires = new LinkedList<>();
+        _connections = new HashSet<>();
+    }
+
+    @Override
+    public boolean containsPoint(int x, int y) {
+        return ((Math.abs(x - _centerX) <= _radius)
+                && (Math.abs(y - _centerY) <= _radius));
+    }
+
+
+    @Override
+    public Moveable getMoveable() {
+        if (_currentWire == null) {
+            startWire();
+        }
+
+        return _currentWire;
+    }
+
+    @Override
+    public void unlink() {}
+
+    private void startWire() {
+        _currentWire = new ImageWire(this, _centerX, _centerY);
+    }
+
+    @Override
+    public void drop(ImageWire wire) {
+
+        if (wire == _currentWire){
+            _currentWire = null;
+
+            ImageInputConnector resultPoint = _partGrid.getImageInputConnectorOn(
+                    wire.getXEnd(), wire.getYEnd());
+
+            Log.d(LogTag, "Dropped wire on " + resultPoint);
+
+            // Not connected
+            if (resultPoint == null){
+                return;
+            }
+
+            // Already connected
+            if (_connections.contains(resultPoint)) {
+                return;
+            }
+            _connections.add(resultPoint);
+
+            wire.attachTo(resultPoint, this);
+            _wires.add(wire);
+        }
+        else {
+            Log.w(LogTag,
+                    "Asked to drop non matching wire "
+                            + "(expected " + _currentWire + ", got " + wire + ")");
+        }
+    }
+
+    @Override
+    public void wireUnlinked(ImageWire wire) {
+        _wires.remove(wire);
+        _connections.remove(wire.getAttachedTo());
+    }
+
+    @Override
+    public void drawWires(ScrolledCanvas canvas, boolean devMode) {
+        for (ImageWire wire : _wires) {
+            wire.draw(canvas, devMode);
+        }
+
+        if (_currentWire != null) {
+            _currentWire.draw(canvas, devMode);
+        }
+    }
+
+    @Override
+    public void updatePosition(int x, int y) {
+        _centerX = x;
+        _centerY = y;
+
+        for (ImageWire wire : _wires){
+            wire.moveStart(x, y);
+        }
+    }
+
+    @Override
+    public List<Tuple2<String, String>> getConnectionEndpoints() {
+        List<Tuple2<String, String>> endpointIds = new LinkedList<>();
+
+        for (ImageWire wire : _wires) {
+            InputConnector inputConnector = wire.getAttachedTo();
+            Part endPart = inputConnector.getPart();
+            endpointIds.add(new Tuple2<>(inputConnector.getId(), endPart.get_id()));
+        }
+
+        return endpointIds;
+    }
+
+    @Override
+    public void connectTo(ImageInputConnector inputConnector) {
+        if (_connections.contains(inputConnector)) {
+            return;
+        }
+
+        _connections.add(inputConnector);
+
+        ImageWire wire = new ImageWire(this, _centerX, _centerY);
+        wire.attachTo(inputConnector, this);
+        _wires.add(wire);
+    }
+
+    @Override
+    public void draw(ScrolledCanvas canvas, boolean devMode) {
+        // TODO: Complete this part
+    }
+
+    public void send(ImageSignal signal) {
+        for (ImageWire wire : _wires){
+            wire.send(signal);
+        }
+    }
+
+    @Override
+    public Object query(Object lastValue) {
+        return _part.query(lastValue);
+    }
+
+    public int getX() {
+        return _centerX;
+    }
+
+    public int getY() {
+        return _centerY;
+    }
+
+    public float getRadius() {
+        return _radius;
+    }
+
+    public List<ImageWire> getWires() {
+        return this._wires;
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/parts/connectors/ProgramakerCustomBlockInputConnector.java

@@ -0,0 +1,140 @@
+package com.codigoparallevar.minicards.parts.connectors;
+
+import android.util.Log;
+
+import com.codigoparallevar.minicards.CanvasView;
+import com.codigoparallevar.minicards.parts.values.StaticValuePart;
+import com.codigoparallevar.minicards.types.Moveable;
+import com.codigoparallevar.minicards.types.Part;
+import com.codigoparallevar.minicards.types.PartGrid;
+import com.codigoparallevar.minicards.types.connectors.RoundConnector;
+import com.codigoparallevar.minicards.types.connectors.Wiring.AnyWire;
+import com.codigoparallevar.minicards.types.connectors.Wiring.Wire;
+import com.codigoparallevar.minicards.types.connectors.input.AnyInputConnector;
+import com.codigoparallevar.minicards.types.wireData.AnySignal;
+
+import java.util.LinkedList;
+import java.util.List;
+
+public class ProgramakerCustomBlockInputConnector extends AnyInputConnector implements RoundConnector {
+    private static final int STATIC_VALUE_SEPARATION = 200;
+    private final Part _part;
+    private final ConnectorTypeInfo _typeInfo;
+    private final PartGrid _partGrid;
+    private int _xposition;
+    private int _yposition;
+    private final int _radius;
+    private final List<Wire> _attachments = new LinkedList<>();
+
+    public ProgramakerCustomBlockInputConnector(Part part, PartGrid partGrid,
+                                                int inputConnectorCenterX, int inputConnectorCenterY,
+                                                int inputConnectorRadius, ConnectorTypeInfo typeInfo) {
+        _part = part;
+        _partGrid = partGrid;
+        _xposition = inputConnectorCenterX;
+        _yposition = inputConnectorCenterY;
+        _radius = inputConnectorRadius;
+        _typeInfo = typeInfo;
+    }
+
+    @Override
+    public boolean containsPoint(int x, int y) {
+        return ((Math.abs(x - _xposition) <= _radius)
+                && (Math.abs(y - _yposition) <= _radius));
+    }
+
+    @Override
+    public Moveable getMoveable() {
+        return new Wire(this, _xposition, _yposition);
+    }
+
+    @Override
+    public void unlink() {
+        for (Wire wire : _attachments) {
+            wire.unlink();
+        }
+    }
+
+    @Override
+    public void updatePosition(int x, int y) {
+        _xposition = x;
+        _yposition = y;
+
+        for (Wire wire : _attachments){
+            wire.moveEnd(x, y);
+        }
+    }
+
+    public Object query(Object lastValue) {
+        for (Wire linked : _attachments) {
+            Object returned = linked.query(lastValue);
+            if (returned != null) {
+                return returned;
+            }
+        }
+
+        return null;
+    }
+
+    @Override
+    public int getX() {
+        return _xposition;
+    }
+
+    @Override
+    public int getY() {
+        return _yposition;
+    }
+
+    public float getRadius() {
+        return _radius;
+    }
+
+    @Override
+    public void send(AnySignal signal) {
+        _part.send(this, signal);
+    }
+
+    @Override
+    public void addAttachment(Wire wire) {
+        _attachments.add(wire);
+    }
+
+    @Override
+    public Part getPart() {
+        return _part;
+    }
+
+    @Override
+    public String getId() {
+        return _part.getConnectorId(this);
+    }
+
+    @Override
+    public void drop(Wire wire) {
+        Log.d("InputConnector", "Dropped wire " + wire);
+    }
+
+    @Override
+    public void wireUnlinked(Wire wire) {
+        _attachments.remove(wire);
+    }
+
+    public void touched() {
+        // If it doesn't have wires connected, spawn a value block
+        if (this._attachments.size() > 0) {
+            return;
+        }
+
+        final PartGrid grid = _partGrid;
+
+        if (grid instanceof CanvasView) {
+            StaticValuePart value = new StaticValuePart(_partGrid,
+                    this._xposition, this._yposition - STATIC_VALUE_SEPARATION,
+                    this._typeInfo);
+            AnyWire wire = value.getOutputWire();
+            value.getValueOutput().drop(wire, this);
+            ((CanvasView) grid).addPart(value);
+        }
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/parts/connectors/RoundInputConnector.java

@@ -65,14 +65,17 @@ public class RoundInputConnector implements SignalInputConnector {
         return _yposition;
     }
 
+    public float getRadius() {
+        return _radius;
+    }
+
     @Override
     public void send(Signal signal) {
         _part.send(this, signal);
     }
 
-
     @Override
-    public void getAttachment(Wire<Signal, SignalInputConnector> wire) {
+    public void addAttachment(Wire<Signal, SignalInputConnector> wire) {
         _attachments.add(wire);
     }
 
@@ -92,7 +95,7 @@ public class RoundInputConnector implements SignalInputConnector {
     }
 
     @Override
-    public void unlinkWire(Wire wire) {
+    public void wireUnlinked(Wire wire) {
         _attachments.remove(wire);
     }
 }

app/src/main/java/com/codigoparallevar/minicards/parts/connectors/RoundOutputConnector.java

@@ -1,158 +1,14 @@
 package com.codigoparallevar.minicards.parts.connectors;
 
-import android.util.Log;
-
-import com.codigoparallevar.minicards.ScrolledCanvas;
-import com.codigoparallevar.minicards.types.Drawable;
-import com.codigoparallevar.minicards.types.Moveable;
-import com.codigoparallevar.minicards.types.Part;
-import com.codigoparallevar.minicards.types.PartGrid;
-import com.codigoparallevar.minicards.types.Tuple2;
-import com.codigoparallevar.minicards.types.connectors.Wiring.SignalWire;
+import com.codigoparallevar.minicards.types.connectors.RoundConnector;
+import com.codigoparallevar.minicards.types.connectors.Wiring.Wire;
 import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
-import com.codigoparallevar.minicards.types.connectors.input.SignalInputConnector;
-import com.codigoparallevar.minicards.types.connectors.output.SignalOutputConnector;
-import com.codigoparallevar.minicards.types.wireData.Signal;
+import com.codigoparallevar.minicards.types.connectors.output.OutputConnector;
+import com.codigoparallevar.minicards.types.wireData.WireDataType;
 
-import java.util.HashSet;
-import java.util.LinkedList;
-import java.util.List;
-
-public class RoundOutputConnector implements Drawable, SignalOutputConnector {
-    private PartGrid _partGrid;
-    private int _centerX;
-    private int _centerY;
-    private final int _radius;
-    private final Part _part;
-    private SignalWire _currentWire = null;
-    private final List<SignalWire> _wires;
-    private final HashSet<InputConnector> _connections;
-
-    public RoundOutputConnector(Part part, PartGrid partGrid, int centerX, int centerY, int radius) {
-        _part = part;
-        _partGrid = partGrid;
-        _centerX = centerX;
-        _centerY = centerY;
-        _radius  = radius;
-        _wires = new LinkedList<>();
-        _connections = new HashSet<>();
-    }
-
-    @Override
-    public boolean containsPoint(int x, int y) {
-        return ((Math.abs(x - _centerX) <= _radius)
-                && (Math.abs(y - _centerY) <= _radius));
-    }
-
-
-    @Override
-    public Moveable getMoveable() {
-        if (_currentWire == null) {
-            startWire();
-        }
-
-        return _currentWire;
-    }
-
-    @Override
-    public void unlink() {}
-
-    private void startWire() {
-        _currentWire = new SignalWire(this, _centerX, _centerY);
-    }
-
-    @Override
-    public void drop(SignalWire wire) {
-
-        if (wire == _currentWire){
-            _currentWire = null;
-
-            SignalInputConnector resultPoint = _partGrid.getSignalInputConnectorOn(
-                    wire.getXEnd(), wire.getYEnd());
-
-            Log.d("RoundOutputConnector", "Dropped wire on " + resultPoint);
-
-            // Not connected
-            if (resultPoint == null){
-                return;
-            }
-
-            // Already connected
-            if (_connections.contains(resultPoint)) {
-                return;
-            }
-            _connections.add(resultPoint);
-
-            wire.attachTo(resultPoint);
-            _wires.add(wire);
-        }
-        else {
-            Log.w("RoundOutputConnector",
-                    "Asked to drop non matching wire "
-                            + "(expected " + _currentWire + ", got " + wire + ")");
-        }
-    }
-
-    @Override
-    public void unlinkWire(SignalWire wire) {
-        _wires.remove(wire);
-    }
-
-    @Override
-    public void drawWires(ScrolledCanvas canvas, boolean devMode) {
-        for (SignalWire wire : _wires) {
-            wire.draw(canvas, devMode);
-        }
-
-        if (_currentWire != null) {
-            _currentWire.draw(canvas, devMode);
-        }
-    }
-
-    @Override
-    public void updatePosition(int x, int y) {
-        _centerX = x;
-        _centerY = y;
-
-        for (SignalWire wire : _wires){
-            wire.moveStart(x, y);
-        }
-    }
-
-    @Override
-    public List<Tuple2<String, String>> getConnectionEndpoints() {
-        List<Tuple2<String, String>> endpointIds = new LinkedList<>();
-
-        for (SignalWire wire : _wires) {
-            InputConnector inputConnector = wire.getAttachedTo();
-            Part endPart = inputConnector.getPart();
-            endpointIds.add(new Tuple2<>(inputConnector.getId(), endPart.get_id()));
-        }
-
-        return endpointIds;
-    }
-
-    @Override
-    public void connectTo(SignalInputConnector inputConnector) {
-        if (_connections.contains(inputConnector)) {
-            return;
-        }
-
-        _connections.add(inputConnector);
-
-        SignalWire wire = new SignalWire(this, _centerX, _centerY);
-        wire.attachTo(inputConnector);
-        _wires.add(wire);
-    }
-
-    @Override
-    public void draw(ScrolledCanvas canvas, boolean devMode) {
-        // TODO: Complete this part
-    }
-
-    public void send(Signal signal) {
-        for (SignalWire wire : _wires){
-            wire.send(signal);
-        }
-    }
+public interface RoundOutputConnector<
+        T1 extends WireDataType,
+        T2 extends InputConnector<T1, T2>,
+        T3 extends Wire<T1, T2>
+        > extends RoundConnector, OutputConnector<T1, T2, T3> {
 }

app/src/main/java/com/codigoparallevar/minicards/parts/connectors/SignalRoundOutputConnector.java

@@ -0,0 +1,183 @@
+package com.codigoparallevar.minicards.parts.connectors;
+
+import android.util.Log;
+
+import com.codigoparallevar.minicards.ScrolledCanvas;
+import com.codigoparallevar.minicards.types.Drawable;
+import com.codigoparallevar.minicards.types.Moveable;
+import com.codigoparallevar.minicards.types.Part;
+import com.codigoparallevar.minicards.types.PartGrid;
+import com.codigoparallevar.minicards.types.connectors.Wiring.SignalWire;
+import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
+import com.codigoparallevar.minicards.types.connectors.input.SignalInputConnector;
+import com.codigoparallevar.minicards.types.connectors.output.SignalOutputConnector;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+import com.codigoparallevar.minicards.types.wireData.Signal;
+
+import java.util.HashSet;
+import java.util.LinkedList;
+import java.util.List;
+
+public class SignalRoundOutputConnector implements Drawable, SignalOutputConnector,
+        RoundOutputConnector<Signal, SignalInputConnector, SignalWire> {
+    private static final String LogTag = "RoundOutputConnector";
+
+    private PartGrid _partGrid;
+    private int _centerX;
+    private int _centerY;
+    private final int _radius;
+    private final Part _part;
+    private SignalWire _currentWire = null;
+    private final List<SignalWire> _wires;
+    private final HashSet<InputConnector> _connections;
+
+    public SignalRoundOutputConnector(Part part, PartGrid partGrid, int centerX, int centerY, int radius) {
+        _part = part;
+        _partGrid = partGrid;
+        _centerX = centerX;
+        _centerY = centerY;
+        _radius  = radius;
+        _wires = new LinkedList<>();
+        _connections = new HashSet<>();
+    }
+
+    @Override
+    public boolean containsPoint(int x, int y) {
+        return ((Math.abs(x - _centerX) <= _radius)
+                && (Math.abs(y - _centerY) <= _radius));
+    }
+
+
+    @Override
+    public Moveable getMoveable() {
+        if (_currentWire == null) {
+            startWire();
+        }
+
+        return _currentWire;
+    }
+
+    @Override
+    public void unlink() {}
+
+    private void startWire() {
+        _currentWire = new SignalWire(this, _centerX, _centerY);
+    }
+
+    @Override
+    public void drop(SignalWire wire) {
+
+        if (wire == _currentWire){
+            _currentWire = null;
+
+            SignalInputConnector resultPoint = _partGrid.getSignalInputConnectorOn(
+                    wire.getXEnd(), wire.getYEnd());
+
+            Log.d(LogTag, "Dropped wire on " + resultPoint);
+
+            // Not connected
+            if (resultPoint == null){
+                return;
+            }
+
+            // Already connected
+            if (_connections.contains(resultPoint)) {
+                return;
+            }
+            _connections.add(resultPoint);
+
+            wire.attachTo(resultPoint, this);
+            _wires.add(wire);
+        }
+        else {
+            Log.w(LogTag,
+                    "Asked to drop non matching wire "
+                            + "(expected " + _currentWire + ", got " + wire + ")");
+        }
+    }
+
+    @Override
+    public void wireUnlinked(SignalWire wire) {
+        _wires.remove(wire);
+        _connections.remove(wire.getAttachedTo());
+    }
+
+    @Override
+    public void drawWires(ScrolledCanvas canvas, boolean devMode) {
+        for (SignalWire wire : _wires) {
+            wire.draw(canvas, devMode);
+        }
+
+        if (_currentWire != null) {
+            _currentWire.draw(canvas, devMode);
+        }
+    }
+
+    @Override
+    public void updatePosition(int x, int y) {
+        _centerX = x;
+        _centerY = y;
+
+        for (SignalWire wire : _wires){
+            wire.moveStart(x, y);
+        }
+    }
+
+    @Override
+    public List<Tuple2<String, String>> getConnectionEndpoints() {
+        List<Tuple2<String, String>> endpointIds = new LinkedList<>();
+
+        for (SignalWire wire : _wires) {
+            InputConnector inputConnector = wire.getAttachedTo();
+            Part endPart = inputConnector.getPart();
+            endpointIds.add(new Tuple2<>(inputConnector.getId(), endPart.get_id()));
+        }
+
+        return endpointIds;
+    }
+
+    @Override
+    public void connectTo(SignalInputConnector inputConnector) {
+        if (_connections.contains(inputConnector)) {
+            return;
+        }
+
+        _connections.add(inputConnector);
+
+        SignalWire wire = new SignalWire(this, _centerX, _centerY);
+        wire.attachTo(inputConnector, this);
+        _wires.add(wire);
+    }
+
+    @Override
+    public void draw(ScrolledCanvas canvas, boolean devMode) {
+        // TODO: Complete this part
+    }
+
+    public void send(Signal signal) {
+        for (SignalWire wire : _wires){
+            wire.send(signal);
+        }
+    }
+
+    @Override
+    public Object query(Object lastValue) {
+        return _part.query(lastValue);
+    }
+
+    public int getX() {
+        return _centerX;
+    }
+
+    public int getY() {
+        return _centerY;
+    }
+
+    public float getRadius() {
+        return _radius;
+    }
+
+    public List<SignalWire> getWires() {
+        return this._wires;
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/parts/connectors/StringRoundInputConnector.java

@@ -72,7 +72,7 @@ public class StringRoundInputConnector implements StringInputConnector {
 
 
     @Override
-    public void getAttachment(Wire<StringSignal, StringInputConnector> wire) {
+    public void addAttachment(Wire<StringSignal, StringInputConnector> wire) {
         _attachments.add(wire);
     }
 
@@ -92,7 +92,7 @@ public class StringRoundInputConnector implements StringInputConnector {
     }
 
     @Override
-    public void unlinkWire(Wire wire) {
+    public void wireUnlinked(Wire wire) {
         _attachments.remove(wire);
     }
 }

app/src/main/java/com/codigoparallevar/minicards/parts/connectors/StringRoundOutputConnector.java

@@ -7,11 +7,12 @@ import com.codigoparallevar.minicards.types.Drawable;
 import com.codigoparallevar.minicards.types.Moveable;
 import com.codigoparallevar.minicards.types.Part;
 import com.codigoparallevar.minicards.types.PartGrid;
-import com.codigoparallevar.minicards.types.Tuple2;
 import com.codigoparallevar.minicards.types.connectors.Wiring.StringWire;
+import com.codigoparallevar.minicards.types.connectors.Wiring.Wire;
 import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
 import com.codigoparallevar.minicards.types.connectors.input.StringInputConnector;
 import com.codigoparallevar.minicards.types.connectors.output.StringOutputConnector;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
 import com.codigoparallevar.minicards.types.wireData.StringSignal;
 
 import java.util.HashSet;
@@ -83,7 +84,7 @@ public class StringRoundOutputConnector implements Drawable, StringOutputConnect
             }
             _connections.add(resultPoint);
 
-            wire.attachTo(resultPoint);
+            wire.attachTo(resultPoint, this);
             _wires.add(wire);
         }
         else {
@@ -94,8 +95,9 @@ public class StringRoundOutputConnector implements Drawable, StringOutputConnect
     }
 
     @Override
-    public void unlinkWire(StringWire wire) {
+    public void wireUnlinked(StringWire wire) {
         _wires.remove(wire);
+        _connections.remove(wire.getAttachedTo());
     }
 
     @Override
@@ -141,7 +143,7 @@ public class StringRoundOutputConnector implements Drawable, StringOutputConnect
         _connections.add(inputConnector);
 
         StringWire wire = new StringWire(this, _centerX, _centerY);
-        wire.attachTo(inputConnector);
+        wire.attachTo(inputConnector, this);
         _wires.add(wire);
     }
 
@@ -155,4 +157,14 @@ public class StringRoundOutputConnector implements Drawable, StringOutputConnect
             wire.send(signal);
         }
     }
+
+    @Override
+    public Object query(Object lastValue) {
+        return _part.query(lastValue);
+    }
+
+    @Override
+    public List<StringWire> getWires() {
+        return _wires;
+    }
 }

app/src/main/java/com/codigoparallevar/minicards/parts/logic/Ticker.java

@@ -7,12 +7,13 @@ import android.util.Log;
 
 import com.codigoparallevar.minicards.PartInstantiator;
 import com.codigoparallevar.minicards.ScrolledCanvas;
-import com.codigoparallevar.minicards.parts.connectors.RoundOutputConnector;
+import com.codigoparallevar.minicards.parts.connectors.SignalRoundOutputConnector;
+import com.codigoparallevar.minicards.parts.style.CardTheme;
 import com.codigoparallevar.minicards.types.Moveable;
 import com.codigoparallevar.minicards.types.Part;
 import com.codigoparallevar.minicards.types.PartConnection;
 import com.codigoparallevar.minicards.types.PartGrid;
-import com.codigoparallevar.minicards.types.Tuple2;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
 import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
 import com.codigoparallevar.minicards.types.connectors.output.OutputConnector;
 import com.codigoparallevar.minicards.types.wireData.Signal;
@@ -39,7 +40,7 @@ public class Ticker implements Part {
     private int _right;
     private int _bottom;
     private List<OutputConnector> _outputConnectors;
-    private final RoundOutputConnector _signalOutputConnector;
+    private final SignalRoundOutputConnector _signalOutputConnector;
     private final long SLEEP_TIME = 1000;
     private Thread _thread = null;
 
@@ -52,7 +53,7 @@ public class Ticker implements Part {
         _bottom = bottom;
 
         // Create connectors
-        _signalOutputConnector = new RoundOutputConnector(
+        _signalOutputConnector = new SignalRoundOutputConnector(
                 this,
                 _partGrid,
                 getOutputConnectorCenterX(), getOutputConnectorCenterY(),
@@ -124,7 +125,7 @@ public class Ticker implements Part {
                     paint);
 
 
-            // Craw a little clock
+            // Draw a little clock
             Paint clockPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
             clockPaint.setStyle(Paint.Style.STROKE);
             clockPaint.setColor(Color.YELLOW);
@@ -144,12 +145,21 @@ public class Ticker implements Part {
     }
 
     private void drawConnector(ScrolledCanvas canvas) {
-        Paint connectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
-        connectorPaint.setColor(Color.RED);
+        Paint outerConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        outerConnectorPaint.setColor(CardTheme.PULSE_CONNECTOR_COLOR_OUTER);
 
-        canvas.drawCircle(_right, getOutputConnectorCenterY(),
+        canvas.drawCircle(getOutputConnectorCenterX(),
+                getOutputConnectorCenterY(),
                 getOutputConnectRadius(),
-                connectorPaint);
+                outerConnectorPaint);
+
+        Paint innerConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        innerConnectorPaint.setColor(CardTheme.PULSE_CONNECTOR_COLOR_INNER);
+
+        canvas.drawCircle(getOutputConnectorCenterX(),
+                getOutputConnectorCenterY(),
+                getOutputConnectRadius() / 2,
+                innerConnectorPaint);
     }
 
     private void drawWires(ScrolledCanvas canvas, boolean devMode) {
@@ -261,20 +271,17 @@ public class Ticker implements Part {
 
     @Override
     public void resume() {
-        _thread = new Thread(new Runnable() {
-            @Override
-            public void run() {
-                while (Ticker.this._thread == Thread.currentThread()) {
-                    Ticker.this._signalOutputConnector.send(new Signal());
-                    _partGrid.update();
+        _thread = new Thread(() -> {
+            while (Ticker.this._thread == Thread.currentThread()) {
+                Ticker.this._signalOutputConnector.send(new Signal());
+                _partGrid.update();
 
-                    try {
-                        Thread.sleep(SLEEP_TIME);
-                    } catch (InterruptedException e) {
-                        Log.e("Minicards Ticker", "Wait failed", e);
-                        Ticker.this._thread = null;
-                        return;
-                    }
+                try {
+                    Thread.sleep(SLEEP_TIME);
+                } catch (InterruptedException e) {
+                    Log.e("Minicards Ticker", "Wait failed", e);
+                    Ticker.this._thread = null;
+                    return;
                 }
             }
         });
@@ -287,13 +294,18 @@ public class Ticker implements Part {
         _thread = null;
     }
 
+    @Override
+    public Object query(Object lastValue) {
+        return null; // No relevant value (maybe time?)
+    }
+
 
     private int getOutputConnectorCenterX() {
-        return _right;
+        return (_left + _right) / 2;
     }
 
     private int getOutputConnectorCenterY() {
-        return (_top + _bottom) / 2;
+        return _bottom;
     }
 
     private int getOutputConnectRadius() {

app/src/main/java/com/codigoparallevar/minicards/parts/logic/Toggle.java

@@ -9,11 +9,12 @@ import com.codigoparallevar.minicards.PartInstantiator;
 import com.codigoparallevar.minicards.ScrolledCanvas;
 import com.codigoparallevar.minicards.parts.connectors.BooleanRoundOutputConnector;
 import com.codigoparallevar.minicards.parts.connectors.RoundInputConnector;
+import com.codigoparallevar.minicards.parts.style.CardTheme;
 import com.codigoparallevar.minicards.types.Moveable;
 import com.codigoparallevar.minicards.types.Part;
 import com.codigoparallevar.minicards.types.PartConnection;
 import com.codigoparallevar.minicards.types.PartGrid;
-import com.codigoparallevar.minicards.types.Tuple2;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
 import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
 import com.codigoparallevar.minicards.types.connectors.input.SignalInputConnector;
 import com.codigoparallevar.minicards.types.connectors.output.OutputConnector;
@@ -128,20 +129,41 @@ public class Toggle implements Part {
     }
 
     private void drawConnector(ScrolledCanvas canvas) {
-        Paint inputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
-        inputConnectorPaint.setColor(Color.YELLOW);
+        // Input
+        Paint outerInputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        outerInputConnectorPaint.setColor(CardTheme.PULSE_CONNECTOR_COLOR_OUTER);
 
         canvas.drawCircle(
-                getInputConnectorCenterX(), getInputConnectorCenterY(),
+                getInputConnectorCenterX(),
+                getInputConnectorCenterY(),
                 getInputConnectRadius(),
-                inputConnectorPaint);
+                outerInputConnectorPaint);
 
-        Paint outputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
-        outputConnectorPaint.setColor(Color.RED);
+        Paint innerInputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        innerInputConnectorPaint.setColor(CardTheme.PULSE_CONNECTOR_COLOR_INNER);
 
-        canvas.drawCircle(_right, getOutputConnectorCenterY(),
+        canvas.drawCircle(
+                getInputConnectorCenterX(),
+                getInputConnectorCenterY(),
+                getInputConnectRadius() / 2,
+                innerInputConnectorPaint);
+
+        // Output
+        Paint outerOutputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        outerOutputConnectorPaint.setColor(CardTheme.BOOLEAN_CONNECTOR_COLOR_OUTER);
+
+        canvas.drawCircle(getOutputConnectorCenterX(),
+                getOutputConnectorCenterY(),
                 getOutputConnectRadius(),
-                outputConnectorPaint);
+                outerOutputConnectorPaint);
+
+        Paint innerOutputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        innerOutputConnectorPaint.setColor(CardTheme.BOOLEAN_CONNECTOR_COLOR_INNER);
+
+        canvas.drawCircle(getOutputConnectorCenterX(),
+                getOutputConnectorCenterY(),
+                getOutputConnectRadius() / 2,
+                innerOutputConnectorPaint);
     }
 
     private void drawWires(ScrolledCanvas canvas, boolean devMode) {
@@ -266,6 +288,11 @@ public class Toggle implements Part {
 
     }
 
+    @Override
+    public Object query(Object lastValue) {
+        return _activated;
+    }
+
     public static Tuple2<Part, List<PartConnection>> deserialize(PartGrid partGrid, JSONObject data) throws JSONException {
         String id = data.getString("id");
         int left = data.getInt("left");
@@ -306,7 +333,7 @@ public class Toggle implements Part {
     }
 
     public int getInputConnectorCenterX() {
-        return get_left();
+        return (get_left() + get_right()) / 2;
     }
 
     private int getInputConnectRadius() {
@@ -314,15 +341,15 @@ public class Toggle implements Part {
     }
 
     public int getInputConnectorCenterY() {
-        return (get_top() + get_bottom()) / 2;
+        return get_top();
     }
 
     private int getOutputConnectorCenterX() {
-        return _right;
+        return (get_left() + get_right()) / 2;
     }
 
     private int getOutputConnectorCenterY() {
-        return (_top + _bottom) / 2;
+        return get_bottom();
     }
 
     private int getOutputConnectRadius() {

app/src/main/java/com/codigoparallevar/minicards/parts/samples/ColorBox.java

@@ -8,10 +8,11 @@ import android.util.Log;
 import com.codigoparallevar.minicards.PartInstantiator;
 import com.codigoparallevar.minicards.ScrolledCanvas;
 import com.codigoparallevar.minicards.parts.connectors.BooleanRoundInputConnector;
+import com.codigoparallevar.minicards.parts.style.CardTheme;
 import com.codigoparallevar.minicards.types.Moveable;
 import com.codigoparallevar.minicards.types.Part;
 import com.codigoparallevar.minicards.types.PartGrid;
-import com.codigoparallevar.minicards.types.Tuple2;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
 import com.codigoparallevar.minicards.types.connectors.input.BooleanInputConnector;
 import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
 import com.codigoparallevar.minicards.types.connectors.output.OutputConnector;
@@ -105,13 +106,23 @@ public class ColorBox implements Part {
     }
 
     private void drawConnector(ScrolledCanvas canvas) {
-        Paint connectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
-        connectorPaint.setColor(Color.YELLOW);
+        Paint outerInputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        outerInputConnectorPaint.setColor(CardTheme.BOOLEAN_CONNECTOR_COLOR_OUTER);
 
         canvas.drawCircle(
-                getInputConnectorCenterX(), getInputConnectorCenterY(),
+                getInputConnectorCenterX(),
+                getInputConnectorCenterY(),
                 getInputConnectRadius(),
-                connectorPaint);
+                outerInputConnectorPaint);
+
+        Paint innerInputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        innerInputConnectorPaint.setColor(CardTheme.BOOLEAN_CONNECTOR_COLOR_INNER);
+
+        canvas.drawCircle(
+                getInputConnectorCenterX(),
+                getInputConnectorCenterY(),
+                getInputConnectRadius() / 2,
+                innerInputConnectorPaint);
     }
 
     @Override
@@ -209,6 +220,11 @@ public class ColorBox implements Part {
 
     }
 
+    @Override
+    public Object query(Object lastValue) {
+        return null;
+    }
+
     public static Part deserialize(PartGrid partGrid, JSONObject data) throws JSONException {
         String id = data.getString("id");
         int left = data.getInt("left");
@@ -238,7 +254,7 @@ public class ColorBox implements Part {
     }
 
     public int getInputConnectorCenterX() {
-        return get_left();
+        return (get_left() + get_right()) / 2;
     }
 
     private int getInputConnectRadius() {
@@ -246,7 +262,7 @@ public class ColorBox implements Part {
     }
 
     public int getInputConnectorCenterY() {
-        return (get_top() + get_bottom()) / 2;
+        return get_top();
     }
 
     public static PartInstantiator getInstantiator() {

app/src/main/java/com/codigoparallevar/minicards/parts/samples/Placeholder.java

@@ -1,184 +0,0 @@
-package com.codigoparallevar.minicards.parts.samples;
-
-import android.graphics.Color;
-import android.graphics.Paint;
-import android.util.Log;
-
-import com.codigoparallevar.minicards.ScrolledCanvas;
-import com.codigoparallevar.minicards.types.Moveable;
-import com.codigoparallevar.minicards.types.Part;
-import com.codigoparallevar.minicards.types.PartGrid;
-import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
-import com.codigoparallevar.minicards.types.connectors.output.OutputConnector;
-import com.codigoparallevar.minicards.types.wireData.WireDataType;
-
-import org.json.JSONException;
-import org.json.JSONObject;
-
-import java.util.Collections;
-import java.util.List;
-import java.util.UUID;
-
-public class Placeholder implements Part {
-    private final String _id;
-    private final PartGrid _partGrid;
-    private int _left;
-    private int _top;
-    private int _right;
-    private int _bottom;
-
-    public Placeholder(String id, PartGrid partGrid, int left, int top, int right, int bottom) {
-        _id = id;
-        _partGrid = partGrid;
-        _left = left;
-        _top = top;
-        _right = right;
-        _bottom = bottom;
-    }
-
-    public Placeholder(PartGrid partGrid, int left, int top, int right, int bottom) {
-        this(UUID.randomUUID().toString(), partGrid, left, top, right, bottom);
-    }
-
-    @Override
-    public int get_left() {
-        return _left;
-    }
-
-    @Override
-    public int get_right() {
-        return _right;
-    }
-
-    @Override
-    public int get_top() {
-        return _top;
-    }
-
-    @Override
-    public int get_bottom() {
-        return _bottom;
-    }
-
-    @Override
-    public void draw(ScrolledCanvas canvas, boolean devMode) {
-        Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
-        paint.setColor(Color.WHITE);
-
-        // Top
-        canvas.drawLine(_left, _top, _right, _top, paint);
-        // Bottom
-        canvas.drawLine(_left, _bottom, _right, _bottom, paint);
-        // Left
-        canvas.drawLine(_left, _top, _left, _bottom, paint);
-        // Right
-        canvas.drawLine(_right, _top, _right, _bottom, paint);
-        // Cross, top-left, bottom-right
-        canvas.drawLine(_left, _top, _right, _bottom, paint);
-        // Cross, top-right, bottom-left
-        canvas.drawLine(_right, _top, _left, _bottom, paint);
-    }
-
-    @Override
-    public void moveEnd(int x, int y) {
-        final int width = _right - _left;
-        final int height = _bottom - _top;
-
-        _left = x - width / 2;
-        _right = _left + width;
-
-        _top = y - height / 2;
-        _bottom = _top + height;
-    }
-
-    @Override
-    public void drop(int x, int y) {
-        moveEnd(x, y);
-    }
-
-    @Override
-    public void touched() {
-        Log.d("Placeholder", "Placeholder touched");
-    }
-
-    @Override
-    public List<InputConnector> getInputConnectors() {
-        return Collections.emptyList();
-    }
-
-    @Override
-    public List<OutputConnector> getOutputConnectors() {
-        return Collections.emptyList();
-    }
-
-    @Override
-    public JSONObject serialize() throws JSONException {
-        JSONObject serialized = new JSONObject();
-
-        serialized.put("id", _id);
-        serialized.put("left", _left);
-        serialized.put("top", _top);
-        serialized.put("right", _right);
-        serialized.put("bottom", _bottom);
-
-        return serialized;
-    }
-
-    @Override
-    public void send(InputConnector roundInputConnector, WireDataType signal) {
-        // @TODO: REMOVE THE NEED FOR THIS
-    }
-
-    @Override
-    public String get_id() {
-        return _id;
-    }
-
-    @Override
-    public InputConnector getConnectorWithId(String inputConnectorId) {
-        return null;
-    }
-
-    @Override
-    public String getConnectorId(InputConnector inputConnector) {
-        return null;
-    }
-
-    @Override
-    public void resume() {
-
-    }
-
-    @Override
-    public void pause() {
-
-    }
-
-    public static Part deserialize(PartGrid partGrid, JSONObject data) throws JSONException {
-        String id = data.getString("id");
-        int left = data.getInt("left");
-        int top = data.getInt("top");
-        int right = data.getInt("right");
-        int bottom = data.getInt("bottom");
-
-        return new Placeholder(id, partGrid, left, top, right, bottom);
-    }
-
-    @Override
-    public boolean containsPoint(int x, int y) {
-        return (x >= get_left()) && (x <= get_right())
-                && (y >= get_top()) && (y <= get_bottom());
-    }
-
-    @Override
-    public Moveable getMoveable() {
-        return this;
-    }
-
-    @Override
-    public void unlink() {
-        for (InputConnector input : getInputConnectors()) {
-            input.unlink();
-        }
-    }
-}

app/src/main/java/com/codigoparallevar/minicards/parts/strings/ConvertToString.java

@@ -3,21 +3,22 @@ package com.codigoparallevar.minicards.parts.strings;
 import android.graphics.Color;
 import android.graphics.Paint;
 import android.graphics.Rect;
-import android.support.annotation.NonNull;
 import android.util.Log;
 
 import com.codigoparallevar.minicards.PartInstantiator;
 import com.codigoparallevar.minicards.ScrolledCanvas;
-import com.codigoparallevar.minicards.parts.connectors.AnyRoundInputConnector;
+import com.codigoparallevar.minicards.parts.connectors.ConnectorTypeInfo;
+import com.codigoparallevar.minicards.parts.connectors.ProgramakerCustomBlockInputConnector;
 import com.codigoparallevar.minicards.parts.connectors.StringRoundOutputConnector;
+import com.codigoparallevar.minicards.parts.style.CardTheme;
 import com.codigoparallevar.minicards.types.Moveable;
 import com.codigoparallevar.minicards.types.Part;
 import com.codigoparallevar.minicards.types.PartConnection;
 import com.codigoparallevar.minicards.types.PartGrid;
-import com.codigoparallevar.minicards.types.Tuple2;
 import com.codigoparallevar.minicards.types.connectors.input.AnyInputConnector;
 import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
 import com.codigoparallevar.minicards.types.connectors.output.OutputConnector;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
 import com.codigoparallevar.minicards.types.wireData.StringSignal;
 import com.codigoparallevar.minicards.types.wireData.WireDataType;
 import com.codigoparallevar.minicards.utils.Serializations;
@@ -44,8 +45,6 @@ public class ConvertToString implements Part {
     private int _bottom;
     private List<InputConnector> inputConnectors;
     private AnyInputConnector _toggleInputConnector;
-
-    @NonNull
     private String _lastValue;
 
     private ConvertToString(String id, PartGrid partGrid, int left, int top, int right, int bottom) {
@@ -55,14 +54,15 @@ public class ConvertToString implements Part {
         _top = top;
         _right = right;
         _bottom = bottom;
-        _lastValue = "-";
+        _lastValue = null;
 
         // Input connector
-        _toggleInputConnector = new AnyRoundInputConnector(
-                this,
+        ConnectorTypeInfo typeInfo = new ConnectorTypeInfo(ConnectorTypeInfo.Type.ANY);
+        _toggleInputConnector = new ProgramakerCustomBlockInputConnector(
+                this, _partGrid,
                 getInputConnectorCenterX(),
                 getInputConnectorCenterY(),
-                getInputConnectRadius());
+                getInputConnectRadius(), typeInfo);
         inputConnectors = new LinkedList<>();
         inputConnectors.add(_toggleInputConnector);
 
@@ -110,7 +110,7 @@ public class ConvertToString implements Part {
             drawWires(canvas, devMode);
 
             Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
-            paint.setColor(Color.WHITE);
+            paint.setColor(Color.BLACK);
             canvas.drawRect(
                     new Rect(_left, _top,
                             _right, _bottom),
@@ -119,28 +119,55 @@ public class ConvertToString implements Part {
             Paint textPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
             textPaint.setColor(Color.GREEN);
             textPaint.setTextSize(100);
-            canvas.drawText(_lastValue,
-                    _left,
-                    _top - 5,
+
+            String value = "-";
+            if (_lastValue != null) {
+                value = _lastValue;
+            }
+
+            canvas.drawText(value,
+                    _left + 10,
+                    _bottom - 10,
                     textPaint);
         }
     }
 
     private void drawConnector(ScrolledCanvas canvas) {
-        Paint inputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
-        inputConnectorPaint.setColor(Color.YELLOW);
+        // Input
+        Paint inputOuterConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        inputOuterConnectorPaint.setColor(CardTheme.ANY_CONNECTOR_COLOR_OUTER);
 
         canvas.drawCircle(
-                getInputConnectorCenterX(), getInputConnectorCenterY(),
+                getInputConnectorCenterX(),
+                getInputConnectorCenterY(),
                 getInputConnectRadius(),
-                inputConnectorPaint);
+                inputOuterConnectorPaint);
 
-        Paint outputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
-        outputConnectorPaint.setColor(Color.RED);
+        Paint inputInnerConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        inputInnerConnectorPaint.setColor(CardTheme.ANY_CONNECTOR_COLOR_INNER);
 
-        canvas.drawCircle(_right, getOutputConnectorCenterY(),
+        canvas.drawCircle(
+                getInputConnectorCenterX(),
+                getInputConnectorCenterY(),
+                getInputConnectRadius() / 2,
+                inputInnerConnectorPaint);
+
+        // Output
+        Paint outputOuterConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        outputOuterConnectorPaint.setColor(CardTheme.STRING_CONNECTOR_COLOR_OUTER);
+
+        canvas.drawCircle(getOutputConnectorCenterX(),
+                getOutputConnectorCenterY(),
                 getOutputConnectRadius(),
-                outputConnectorPaint);
+                outputOuterConnectorPaint);
+
+        Paint outputInnerConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        outputInnerConnectorPaint.setColor(CardTheme.STRING_CONNECTOR_COLOR_INNER);
+
+        canvas.drawCircle(getOutputConnectorCenterX(),
+                getOutputConnectorCenterY(),
+                getOutputConnectRadius() / 2,
+                outputInnerConnectorPaint);
     }
 
     private void drawWires(ScrolledCanvas canvas, boolean devMode) {
@@ -228,12 +255,11 @@ public class ConvertToString implements Part {
     public void send(InputConnector roundInputConnector, WireDataType signal) {
         String encoded = "null";
         Object value = signal.get();
-
         if (value != null){
             encoded = value.toString();
         }
 
-        if (!_lastValue.equals(encoded)) {
+        if ((_lastValue == null) || !_lastValue.equals(encoded)) {
             _lastValue = encoded;
 
             _stringOutputConnector.send(new StringSignal(encoded));
@@ -275,6 +301,11 @@ public class ConvertToString implements Part {
 
     }
 
+    @Override
+    public Object query(Object lastValue) {
+        return _lastValue;
+    }
+
     public static Tuple2<Part, List<PartConnection>> deserialize(PartGrid partGrid, JSONObject data) throws JSONException {
         String id = data.getString("id");
         int left = data.getInt("left");
@@ -315,7 +346,7 @@ public class ConvertToString implements Part {
     }
 
     public int getInputConnectorCenterX() {
-        return get_left();
+        return (get_left() + get_right()) / 2;
     }
 
     private int getInputConnectRadius() {
@@ -323,15 +354,15 @@ public class ConvertToString implements Part {
     }
 
     public int getInputConnectorCenterY() {
-        return (get_top() + get_bottom()) / 2;
+        return get_top();
     }
 
     private int getOutputConnectorCenterX() {
-        return _right;
+        return (get_left() + get_right()) / 2;
     }
 
     private int getOutputConnectorCenterY() {
-        return (_top + _bottom) / 2;
+        return get_bottom();
     }
 
     private int getOutputConnectRadius() {

app/src/main/java/com/codigoparallevar/minicards/parts/style/CardTheme.java

@@ -0,0 +1,34 @@
+package com.codigoparallevar.minicards.parts.style;
+
+import android.graphics.Color;
+
+public class CardTheme {
+    public static final int DEFAULT_COLOR_INNER = Color.parseColor("#000000");
+
+    public static final int PULSE_CONNECTOR_COLOR_OUTER = Color.parseColor("#f0c000");
+    public static final int PULSE_CONNECTOR_COLOR_INNER = DEFAULT_COLOR_INNER;
+
+    public static final int BOOLEAN_CONNECTOR_COLOR_OUTER = Color.parseColor("#dd4444");
+    public static final int BOOLEAN_CONNECTOR_COLOR_INNER = DEFAULT_COLOR_INNER;
+
+    public static final int STRING_CONNECTOR_COLOR_OUTER = Color.parseColor("#44dd44");
+    public static final int STRING_CONNECTOR_COLOR_INNER = DEFAULT_COLOR_INNER;
+
+    public static final int ANY_CONNECTOR_COLOR_OUTER = Color.parseColor("#dd44dd");
+    public static final int ANY_CONNECTOR_COLOR_INNER = DEFAULT_COLOR_INNER;
+
+    public static final int ENUM_CONNECTOR_COLOR_OUTER = Color.parseColor("#888888");
+    public static final int ENUM_CONNECTOR_COLOR_INNER = DEFAULT_COLOR_INNER;
+
+    public static final int FLOAT_CONNECTOR_COLOR_OUTER = Color.parseColor("#44dddd");
+    public static final int FLOAT_CONNECTOR_COLOR_INNER = DEFAULT_COLOR_INNER;
+
+    public static final int INTEGER_CONNECTOR_COLOR_OUTER = Color.parseColor("#4444ff");
+    public static final int INTEGER_CONNECTOR_COLOR_INNER = DEFAULT_COLOR_INNER;
+
+    public static final int UNKNOWN_CONNECTOR_COLOR_OUTER = Color.parseColor("#7f7f7f");
+    public static final int UNKNOWN_CONNECTOR_COLOR_INNER = DEFAULT_COLOR_INNER;
+
+    public static final int IMAGE_CONNECTOR_COLOR_OUTER = Color.parseColor("#007700");
+    public static final int IMAGE_CONNECTOR_COLOR_INNER = DEFAULT_COLOR_INNER;
+}

app/src/main/java/com/codigoparallevar/minicards/parts/values/StaticValuePart.java

@@ -0,0 +1,519 @@
+package com.codigoparallevar.minicards.parts.values;
+
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.graphics.Rect;
+import android.os.AsyncTask;
+import android.text.InputType;
+import android.util.Log;
+import android.view.View;
+import android.widget.EditText;
+import android.widget.ProgressBar;
+
+import com.codigoparallevar.minicards.R;
+import com.codigoparallevar.minicards.ScrolledCanvas;
+import com.codigoparallevar.minicards.parts.connectors.AnyRoundOutputConnector;
+import com.codigoparallevar.minicards.parts.connectors.ConnectorTypeInfo;
+import com.codigoparallevar.minicards.types.Moveable;
+import com.codigoparallevar.minicards.types.Part;
+import com.codigoparallevar.minicards.types.PartConnection;
+import com.codigoparallevar.minicards.types.PartGrid;
+import com.codigoparallevar.minicards.types.connectors.Wiring.AnyWire;
+import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
+import com.codigoparallevar.minicards.types.connectors.output.OutputConnector;
+import com.codigoparallevar.minicards.types.functional.Consumer;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+import com.codigoparallevar.minicards.types.functional.Tuple3;
+import com.codigoparallevar.minicards.types.wireData.WireDataType;
+import com.codigoparallevar.minicards.ui_helpers.GetAsync;
+import com.codigoparallevar.minicards.utils.Serializations;
+import com.programaker.api.ProgramakerApi;
+import com.programaker.api.data.ProgramakerCustomBlockArgument;
+import com.programaker.api.data.ProgramakerCustomBlockArgumentValue;
+
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.UUID;
+
+public class StaticValuePart implements Part {
+    private static final int WIDTH_PADDING = 25;
+    private static final int HEIGHT_PADDING = 25;
+    private static final int MIN_HEIGHT = 100;
+    private static final int MIN_WIDTH = 100;
+    private static final String LogTag = "PM StaticValue";
+    private static final int IO_RADIUS = 50;
+    private static final int IO_PADDING = 20;
+
+    private final String _id;
+    private final AnyRoundOutputConnector _outputConnector;
+    private final ConnectorTypeInfo _typeInfo;
+    private final PartGrid _grid;
+    private int _width;
+    private int _height;
+    private int _left;
+    private int _top;
+    private String _value = null;
+    private String _valueId = null;
+
+    public StaticValuePart(String id, PartGrid grid, int centerx, int centery, ConnectorTypeInfo typeInfo, String value, String valueId) {
+        this._id = id;
+        this._typeInfo = typeInfo;
+        this._grid = grid;
+        this._value = value;
+        this._valueId = valueId;
+
+        this.updateWidthHeight();
+
+        this._left = centerx - this._width / 2;
+        this._top = centery - this._height / 2;
+        this._outputConnector = new AnyRoundOutputConnector(this, grid,
+                this._left + _width / 2,
+                this._top + _height, IO_RADIUS);
+    }
+    public StaticValuePart(String id, PartGrid grid, int centerx, int centery, ConnectorTypeInfo typeInfo, String value) {
+        this(id, grid, centerx, centery, typeInfo, value, null);
+    }
+
+    public StaticValuePart(String id, PartGrid grid, int centerx, int centery, ConnectorTypeInfo typeInfo) {
+        this(id, grid, centerx, centery, typeInfo, null);
+    }
+
+    public StaticValuePart(PartGrid grid, int centerx, int centery, ConnectorTypeInfo typeInfo) {
+        this(UUID.randomUUID().toString(), grid, centerx, centery, typeInfo);
+    }
+
+    @Override
+    public JSONObject serialize() throws JSONException {
+        JSONObject serialized = new JSONObject();
+
+        serialized.put("id", _id);
+        serialized.put("center_x", _left + _width / 2);
+        serialized.put("center_y", _top + _height / 2);
+        serialized.put("value", _value == null ? JSONObject.NULL : _value);
+        serialized.put("value_id", _valueId == null ? JSONObject.NULL : _valueId);
+
+        JSONObject jsonTypeInfo = _typeInfo.serialize();
+        serialized.put("type_info", jsonTypeInfo);
+
+        serialized.put("on_string_output_connector", serializeConnectionEndpoints());
+
+        return serialized;
+    }
+
+    private JSONArray serializeConnectionEndpoints() {
+        JSONArray serializedData = new JSONArray();
+
+        for (OutputConnector output : getOutputConnectors()) {
+            JSONArray elements = new JSONArray();
+
+            for (Tuple2<String, String> endpoint : (List<Tuple2<String, String>>) output.getConnectionEndpoints()) {
+                elements.put(PartConnection.serializeToJson(endpoint.item1, endpoint.item2));
+            }
+
+            serializedData.put(elements);
+        }
+        return serializedData;
+    }
+
+    public static Tuple2<Part, List<PartConnection>> deserialize(PartGrid grid, JSONObject data) throws JSONException {
+        String id = data.getString("id");
+        int centerx = data.getInt("center_x");
+        int centery = data.getInt("center_y");
+        String value = Serializations.getString(data, "value");
+        String valueId = Serializations.getString(data, "value_id");
+
+        JSONObject jsonTypeInfo = data.getJSONObject("type_info");
+        ConnectorTypeInfo typeInfo = ConnectorTypeInfo.deserialize(jsonTypeInfo);
+        StaticValuePart part = new StaticValuePart(id, grid, centerx, centery, typeInfo, value, valueId);
+
+        List<PartConnection> connections = new LinkedList<>();
+
+        JSONArray allConnectorOuts = data.optJSONArray("on_string_output_connector");
+        if (allConnectorOuts == null) {
+            allConnectorOuts = new JSONArray();
+        }
+
+        for (int i = 0; i < allConnectorOuts.length(); i++) {
+            JSONArray connectorOuts = allConnectorOuts.getJSONArray(i);
+            OutputConnector connector = part.getOutputConnectors().get(i);
+
+            for (int j = 0; j < connectorOuts.length(); j++) {
+                connections.add(PartConnection.deserialize(
+                        connector, connectorOuts.getJSONObject(j)));
+            }
+        }
+
+        return new Tuple2<>(part, connections);
+    }
+
+    public AnyWire getOutputWire() {
+        return this._outputConnector.getMoveable();
+    }
+
+    @Override
+    public int get_left() {
+        return _left;
+    }
+
+    @Override
+    public int get_right() {
+        return _left + _width;
+    }
+
+    @Override
+    public int get_top() {
+        return _top;
+    }
+
+    @Override
+    public int get_bottom() {
+        return _top + _height;
+    }
+
+    private void updateWidthHeight() {
+        Paint p = getTextPaint();
+        String message = getMessage();
+        Rect bounds = new Rect();
+        p.getTextBounds(message, 0, message.length(), bounds);
+
+        this._height = Math.max(MIN_HEIGHT, bounds.height() + HEIGHT_PADDING * 2);
+        int newWidth = Math.max(MIN_WIDTH, bounds.width() + WIDTH_PADDING * 2);
+
+        if (this._width > 0) { // Re-center block
+            this._left -= (newWidth - _width) / 2;
+        }
+        this._width = newWidth;
+    }
+
+    private String getMessage() {
+        if (_value == null) {
+            return "-";
+        } else {
+            return _value;
+        }
+    }
+
+    private String getMessageForEdit() {
+        ConnectorTypeInfo.Type type = _typeInfo.get_type();
+        if (type == ConnectorTypeInfo.Type.INTEGER || type == ConnectorTypeInfo.Type.FLOAT) {
+            if (_value == null) {
+                return "0";
+            }
+            try {
+                Integer.parseInt(_value);
+                return _value;
+            } catch(NumberFormatException ex) {
+                Log.w(LogTag, "StaticPart (type=number), value found=" + _value, ex);
+                return "0";
+            }
+        }
+        else {
+            if (_value == null) {
+                return "";
+            }
+            return _value;
+        }
+    }
+
+    private Paint getTextPaint() {
+        Paint p = new Paint(Paint.ANTI_ALIAS_FLAG);
+        p.setColor(Color.BLACK);
+        p.setTextSize(50);
+        return p;
+    }
+
+    @Override
+    public void touched() {
+        if (!(this._grid instanceof View)) {
+            return; // Can't show dialog if can't retrieve context
+        }
+
+        final Context ctx = ((View) this._grid).getContext();
+        ConnectorTypeInfo.Type type = this._typeInfo.get_type();
+        if (type == ConnectorTypeInfo.Type.PULSE) {
+            return; // Nothing to do here
+        }
+
+        switch (type) {
+            case BOOLEAN:
+                break;
+            case INTEGER:
+            case FLOAT: {
+                final EditText input = new EditText(ctx);
+
+                input.setText(getMessageForEdit());
+                input.setInputType(InputType.TYPE_CLASS_NUMBER);
+
+                dialogAskUserForValue(ctx, input,
+                        () -> {
+                            _value = input.getText().toString();
+                        });
+                break;
+            }
+            default:
+            case ANY:
+            case UNKNOWN:
+            case STRING: {
+                final EditText input = new EditText(ctx);
+
+                input.setText(getMessageForEdit());
+                input.setInputType(InputType.TYPE_CLASS_TEXT);
+                dialogAskUserForValue(ctx, input,
+                        () -> {
+                            _value = input.getText().toString();
+                        });
+                break;
+            }
+            case ENUM:
+                ProgramakerCustomBlockArgument blockArg = _typeInfo.getBlockArgument();
+                String callback = null;
+                if (blockArg != null) {
+                    callback = blockArg.getCallback();
+                    if (callback.equals("null")) { // TODO: Fix this on server
+                        callback = null;
+                    }
+                }
+
+                if (callback == null) {
+                    new AlertDialog.Builder(ctx)
+                            .setMessage(R.string.error_recovering_allowed_values)
+                            .create()
+                            .show();
+                    break;
+                }
+
+                ProgramakerApi api = _grid.getApi();
+                Dialog loadingDialog = createLoadingDialog(ctx);
+                if (!api.hasCachedAllowedValues(blockArg)) {
+                    loadingDialog.show();
+                }
+
+                new GetAsync<List<ProgramakerCustomBlockArgumentValue>>().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR,
+                        new Tuple3<>(
+                                () -> api.fetchAllowedValues(blockArg),
+                                results -> {
+                                    Log.i(LogTag, "Result: " + results);
+                                    loadingDialog.cancel();
+
+                                    String[] names = new String[results.size()];
+                                    int i = 0;
+                                    for (ProgramakerCustomBlockArgumentValue value : results) {
+                                        names[i] = value.getName();
+                                        i++;
+                                    }
+
+                                    Dialog d = createItemDialog(ctx, names, idx -> {
+                                        StaticValuePart.this._value = results.get(idx).getName();
+                                        StaticValuePart.this._valueId = results.get(idx).getId();
+                                        StaticValuePart.this._grid.update();
+                                    });
+                                    d.show();
+                                },
+                                ex -> {
+                                    Log.e(LogTag, "Error retrieving values: " + ex, ex);
+                                    new AlertDialog.Builder(ctx)
+                                            .setMessage(R.string.error_recovering_allowed_values)
+                                            .create()
+                                            .show();
+                                }
+                        ));
+
+                break;
+        }
+    }
+
+    private Dialog createItemDialog(Context ctx, CharSequence[] itemNames, Consumer<Integer> onSelected) {
+        final AlertDialog.Builder builder = new AlertDialog.Builder(ctx);
+
+        builder.setTitle(R.string.set_value);
+
+        final ProgressBar progressBar = new ProgressBar(ctx);
+        progressBar.setIndeterminate(true);
+        builder.setItems(itemNames, (DialogInterface.OnClickListener) (dialog, which) -> {
+            try {
+                onSelected.apply(which);
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        });
+        AlertDialog dialog = builder.create();
+        return dialog;
+    }
+
+    private Dialog createLoadingDialog(Context ctx) {
+        final AlertDialog.Builder builder = new AlertDialog.Builder(ctx);
+
+        builder.setTitle(R.string.loading_available_values);
+
+        final ProgressBar progressBar = new ProgressBar(ctx);
+        progressBar.setIndeterminate(true);
+        builder.setView(progressBar);
+        AlertDialog dialog = builder.create();
+        return dialog;
+    }
+
+    private void dialogAskUserForValue(Context ctx, EditText input, Runnable onAccept) {
+        final AlertDialog.Builder builder = new AlertDialog.Builder(ctx);
+
+        builder.setTitle(R.string.set_value);
+        builder
+                .setPositiveButton(R.string.ok_accept_changes, (dialog, which) -> {
+                    onAccept.run();
+                    this.updateWidthHeight();
+                    ((View) this._grid).invalidate();
+                })
+                .setNegativeButton(R.string.cancel_discard_changes, (dialog, which) -> {
+                    // No change
+                })
+                .setView(input);
+
+        AlertDialog dialog = builder.create();
+        dialog.show();
+
+    }
+
+    @Override
+    public List<InputConnector> getInputConnectors() {
+        // There is not going to be one
+        return Collections.emptyList();
+    }
+
+    @Override
+    public List<OutputConnector> getOutputConnectors() {
+        return new LinkedList<OutputConnector>() {{
+            add(_outputConnector);
+        }};
+    }
+
+    public AnyRoundOutputConnector getValueOutput() {
+        return _outputConnector;
+    }
+
+    @Override
+    public void send(InputConnector inputConnector, WireDataType signal) {
+
+    }
+
+    @Override
+    public String get_id() {
+        return _id;
+    }
+
+    @Override
+    public InputConnector getConnectorWithId(String inputConnectorId) {
+        return null; // No inputs
+    }
+
+    @Override
+    public String getConnectorId(InputConnector inputConnector) {
+        return null; // No inputs
+    }
+
+    @Override
+    public void resume() {
+        // Nothing to do
+    }
+
+    @Override
+    public void pause() {
+        // Nothing to do
+    }
+
+    @Override
+    public Object query(Object lastValue) {
+        if (this._valueId != null) {
+            return this._valueId;
+        }
+
+        return this._value;
+    }
+
+    @Override
+    public void draw(ScrolledCanvas canvas, boolean devMode) {
+        this.updateWidthHeight(); // TODO: Remove after calculations stabilize
+
+        if (!devMode) {
+            return; // Logic block, don't show on user-mode
+        }
+
+        drawConnectors(canvas);
+        drawWires(canvas, devMode);
+
+        Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        paint.setColor(Color.parseColor("#E3FCFC"));
+        canvas.drawRect(
+                new Rect(get_left(), get_top(),
+                        get_right(), get_bottom()),
+                paint);
+
+        Paint textPaint = getTextPaint();
+        canvas.drawText(getMessage(),
+                get_left() + WIDTH_PADDING,
+                get_bottom() - HEIGHT_PADDING,
+                textPaint);
+    }
+
+    private void drawConnectors(ScrolledCanvas canvas) {
+        Paint outerOutputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        outerOutputConnectorPaint.setColor(_typeInfo.getOuterColor());
+
+        canvas.drawCircle(
+                _outputConnector.getX(),
+                _outputConnector.getY(),
+                _outputConnector.getRadius(),
+                outerOutputConnectorPaint);
+
+        Paint innerOutputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        innerOutputConnectorPaint.setColor(_typeInfo.getInnerColor());
+
+        canvas.drawCircle(
+                _outputConnector.getX(),
+                _outputConnector.getY(),
+                _outputConnector.getRadius() / 2,
+                innerOutputConnectorPaint);
+    }
+
+    private void drawWires(ScrolledCanvas canvas, boolean devMode) {
+        _outputConnector.drawWires(canvas, devMode);
+    }
+
+    @Override
+    public void moveEnd(int x, int y) {
+        _left = x - _width / 2;
+        _top = y - _height / 2;
+        this._outputConnector.updatePosition(
+                this._left + _width / 2,
+                this._top + _height);
+    }
+
+    @Override
+    public void drop(int x, int y) {
+        moveEnd(x, y);
+    }
+
+    @Override
+    public boolean containsPoint(int x, int y) {
+        return ((x >= this.get_left()) && (x <= this.get_right())
+                && (y >= this.get_top()) && (y <= this.get_bottom()));
+    }
+
+    @Override
+    public Moveable getMoveable() {
+        return this;
+    }
+
+    @Override
+    public void unlink() {
+        // Nothing to do
+        _outputConnector.unlink();
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/parts/viewers/ImageFrame.java

@@ -0,0 +1,316 @@
+package com.codigoparallevar.minicards.parts.viewers;
+
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.graphics.Color;
+import android.graphics.ImageFormat;
+import android.graphics.Paint;
+import android.graphics.Rect;
+import android.graphics.RectF;
+import android.media.Image;
+import android.os.Build;
+import android.util.Log;
+
+import com.codigoparallevar.minicards.PartInstantiator;
+import com.codigoparallevar.minicards.ScrolledCanvas;
+import com.codigoparallevar.minicards.parts.connectors.ImageRoundInputConnector;
+import com.codigoparallevar.minicards.parts.style.CardTheme;
+import com.codigoparallevar.minicards.types.Moveable;
+import com.codigoparallevar.minicards.types.Part;
+import com.codigoparallevar.minicards.types.PartGrid;
+import com.codigoparallevar.minicards.types.connectors.input.ImageInputConnector;
+import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
+import com.codigoparallevar.minicards.types.connectors.output.OutputConnector;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+import com.codigoparallevar.minicards.types.wireData.ImageSignal;
+import com.codigoparallevar.minicards.types.wireData.WireDataType;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.nio.ByteBuffer;
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.UUID;
+
+public class ImageFrame implements Part {
+    private static final String LogTag = "ImageFrame";
+    private static final int DEFAULT_SIDE_SIZE = 400;
+    private static final String IMAGE_INPUT_CONNECTOR_ID = "image_input_connector";
+
+    private final String _id;
+    private final PartGrid _partGrid;
+    private int _left;
+    private int _top;
+    private int _right;
+    private int _bottom;
+    private List<InputConnector> inputConnectors;
+    private ImageInputConnector _imageInputConnector;
+    private Bitmap lastImage;
+
+    public ImageFrame(String id, PartGrid partGrid, int left, int top, int right, int bottom) {
+        _id = id;
+        _partGrid = partGrid;
+        _left = left;
+        _top = top;
+        _right = right;
+        _bottom = bottom;
+
+        _imageInputConnector = new ImageRoundInputConnector(
+                this,
+                getInputConnectorCenterX(),
+                getInputConnectorCenterY(),
+                getInputConnectRadius());
+        inputConnectors = new LinkedList<>();
+        inputConnectors.add(_imageInputConnector);
+    }
+
+    public  ImageFrame(PartGrid partGrid, int left, int top, int right, int bottom) {
+        this(UUID.randomUUID().toString(), partGrid, left, top, right, bottom);
+    }
+
+    @Override
+    public int get_left() {
+        return _left;
+    }
+
+    @Override
+    public int get_right() {
+        return _right;
+    }
+
+    @Override
+    public int get_top() {
+        return _top;
+    }
+
+    @Override
+    public int get_bottom() {
+        return _bottom;
+    }
+
+    @Override
+    public void draw(ScrolledCanvas canvas, boolean devMode) {
+        if (devMode){
+            drawConnector(canvas);
+            // drawWires(canvas, devMode);
+        }
+
+        Rect frameRect = new Rect(_left, _top, _right, _bottom);
+        if (this.lastImage == null) {
+            Paint backdropPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+            backdropPaint.setColor(Color.parseColor("#444444"));
+
+            canvas.drawRoundRect(new RectF(frameRect), 50, 50, backdropPaint);
+
+            Paint crossPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+            crossPaint.setColor(Color.WHITE);
+
+            // Top
+            canvas.drawLine(_left, _top, _right, _top, crossPaint);
+            // Bottom
+            canvas.drawLine(_left, _bottom, _right, _bottom, crossPaint);
+            // Left
+            canvas.drawLine(_left, _top, _left, _bottom, crossPaint);
+            // Right
+            canvas.drawLine(_right, _top, _right, _bottom, crossPaint);
+            // Cross, top-left, bottom-right
+            canvas.drawLine(_left, _top, _right, _bottom, crossPaint);
+            // Cross, top-right, bottom-left
+            canvas.drawLine(_right, _top, _left, _bottom, crossPaint);
+        }
+        else {
+            canvas.drawBitmap(this.lastImage, frameRect);
+        }
+    }
+
+    private void drawConnector(ScrolledCanvas canvas) {
+        Paint outerInputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        outerInputConnectorPaint.setColor(CardTheme.IMAGE_CONNECTOR_COLOR_OUTER);
+
+        canvas.drawCircle(
+                getInputConnectorCenterX(),
+                getInputConnectorCenterY(),
+                getInputConnectRadius(),
+                outerInputConnectorPaint);
+
+        Paint innerInputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        innerInputConnectorPaint.setColor(CardTheme.IMAGE_CONNECTOR_COLOR_INNER);
+
+        canvas.drawCircle(
+                getInputConnectorCenterX(),
+                getInputConnectorCenterY(),
+                getInputConnectRadius() / 2,
+                innerInputConnectorPaint);
+    }
+
+    @Override
+    public void moveEnd(int x, int y) {
+        final int width = _right - _left;
+        final int height = _bottom - _top;
+
+        _left = x - width / 2;
+        _right = _left + width;
+
+        _top = y - height / 2;
+        _bottom = _top + height;
+
+        _imageInputConnector.updatePosition(
+                getInputConnectorCenterX(),
+                getInputConnectorCenterY());
+    }
+
+    @Override
+    public void drop(int x, int y) {
+        moveEnd(x, y);
+    }
+
+    @Override
+    public void touched() {
+        Log.d(LogTag, "Touched");
+    }
+
+    @Override
+    public List<InputConnector> getInputConnectors() {
+        return inputConnectors;
+    }
+
+    @Override
+    public List<OutputConnector> getOutputConnectors() {
+        return Collections.emptyList();
+    }
+
+    @Override
+    public JSONObject serialize() throws JSONException {
+        JSONObject serialized = new JSONObject();
+
+        serialized.put("id", _id);
+        serialized.put("left", _left);
+        serialized.put("top", _top);
+        serialized.put("right", _right);
+        serialized.put("bottom", _bottom);
+
+        return serialized;
+    }
+
+    @Override
+    public void send(InputConnector roundInputConnector, WireDataType signal) {
+        if (!(signal instanceof ImageSignal)) {
+            Log.e(LogTag, "Mismatched type, expected {ImageSignal}, found {" + signal + "}" );
+        }
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {
+            // No way to get the format?
+            return;
+        }
+
+        ImageSignal imgSignal = (ImageSignal) signal;
+        Image image = imgSignal.get();
+        if (image.getFormat() == ImageFormat.JPEG) {
+            Image.Plane[] planes = image.getPlanes();
+            if (planes.length != 1) {
+                // TODO: Handle this case (what would it mean?)
+                return ;
+            }
+
+            ByteBuffer jpegBuffer = planes[0].getBuffer();
+            byte[] jpegData = new byte[jpegBuffer.remaining()];
+            jpegBuffer.get(jpegData);
+
+            Bitmap bitmap = BitmapFactory.decodeByteArray(jpegData, 0, jpegData.length);
+            this.lastImage = bitmap;
+            this._partGrid.update(); // Maybe this can be avoided? Directly copying the data on the canvas?
+        }
+    }
+
+    @Override
+    public String get_id() {
+        return _id;
+    }
+
+    @Override
+    public InputConnector getConnectorWithId(String inputConnectorId) {
+        switch (inputConnectorId){
+            case ImageFrame.IMAGE_INPUT_CONNECTOR_ID:
+                return _imageInputConnector;
+
+            default:
+                return null;
+        }
+    }
+
+    @Override
+    public String getConnectorId(InputConnector inputConnector) {
+        if (inputConnector == _imageInputConnector){
+            return ImageFrame.IMAGE_INPUT_CONNECTOR_ID;
+        }
+
+        return null;
+    }
+    @Override
+    public void resume() {
+
+    }
+
+    @Override
+    public void pause() {
+
+    }
+
+    @Override
+    public Object query(Object lastValue) {
+        return null;
+    }
+
+    public static Part deserialize(PartGrid partGrid, JSONObject data) throws JSONException {
+        String id = data.getString("id");
+        int left = data.getInt("left");
+        int top = data.getInt("top");
+        int right = data.getInt("right");
+        int bottom = data.getInt("bottom");
+
+        return new ImageFrame(id, partGrid, left, top, right, bottom);
+    }
+
+    @Override
+    public boolean containsPoint(int x, int y) {
+        return (x >= get_left()) && (x <= get_right())
+                && (y >= get_top()) && (y <= get_bottom());
+    }
+
+    @Override
+    public Moveable getMoveable() {
+        return this;
+    }
+
+    @Override
+    public void unlink() {
+        for (InputConnector input : getInputConnectors()) {
+            input.unlink();
+        }
+    }
+
+    public int getInputConnectorCenterX() {
+        return (get_left() + get_right()) / 2;
+    }
+
+    private int getInputConnectRadius() {
+        return (get_right() - get_left()) / 4;
+    }
+
+    public int getInputConnectorCenterY() {
+        return get_top();
+    }
+
+    public static PartInstantiator getInstantiator() {
+        final int halfSideSize = DEFAULT_SIDE_SIZE / 2;
+        return new PartInstantiator() {
+            @Override
+            protected Part instantiate(PartGrid grid, Tuple2<Integer, Integer> center) {
+                return new ImageFrame(grid,
+                        center.item1 - halfSideSize, center.item2 - halfSideSize,
+                        center.item1 + halfSideSize, center.item2 + halfSideSize);
+            }
+        };
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/toolbox/PartCategory.java

@@ -0,0 +1,24 @@
+package com.codigoparallevar.minicards.toolbox;
+
+import com.codigoparallevar.minicards.PartInstantiator;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+
+import java.util.List;
+
+class PartCategory {
+    private final String _name;
+    private final List<Tuple2<String, PartInstantiator>> _parts;
+
+    public PartCategory(String name, List<Tuple2<String, PartInstantiator>> parts) {
+        this._name = name;
+        this._parts = parts;
+    }
+
+    public String getName() {
+        return _name;
+    }
+
+    public List<Tuple2<String, PartInstantiator>> getParts() {
+        return this._parts;
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/toolbox/PartShowcaseView.java

@@ -0,0 +1,101 @@
+package com.codigoparallevar.minicards.toolbox;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.view.View;
+
+import com.codigoparallevar.minicards.PartInstantiator;
+import com.codigoparallevar.minicards.ScrolledCanvas;
+import com.codigoparallevar.minicards.SignalListenerManager;
+import com.codigoparallevar.minicards.types.Part;
+import com.codigoparallevar.minicards.types.PartGrid;
+import com.codigoparallevar.minicards.types.Selectable;
+import com.codigoparallevar.minicards.types.connectors.input.AnyInputConnector;
+import com.codigoparallevar.minicards.types.connectors.input.BooleanInputConnector;
+import com.codigoparallevar.minicards.types.connectors.input.ImageInputConnector;
+import com.codigoparallevar.minicards.types.connectors.input.SignalInputConnector;
+import com.codigoparallevar.minicards.types.connectors.input.StringInputConnector;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+import com.programaker.api.ProgramakerApi;
+
+class PartShowcaseView extends View implements PartGrid {
+    private final Context ctx;
+    private final PartInstantiator instantiator;
+    private final Part part;
+    private final int partWidth;
+    private Tuple2<Integer, Integer> center = new Tuple2<>(0, 0);
+
+    public PartShowcaseView(Context ctx, PartInstantiator instantiator) {
+        super(ctx);
+
+        this.ctx = ctx;
+        this.instantiator = instantiator;
+        this.part = instantiator.build(this);
+        this.part.pause();
+        int height = this.part.get_bottom() - this.part.get_top();
+        partWidth = this.part.get_right() - this.part.get_left();
+
+        this.setMinimumHeight(height * 2);
+        this.setMinimumWidth(partWidth);
+    }
+
+    @Override
+    public void onDraw(Canvas canvas) {
+        int centerx = - Math.max(canvas.getWidth(), partWidth) / 2;
+        int centery = - canvas.getHeight() / 2;
+        this.center = new Tuple2<>(centerx, centery);
+        ScrolledCanvas scrolledCanvas = new ScrolledCanvas(canvas, getCenteredOn());
+        this.part.draw(scrolledCanvas, true);
+    }
+
+    // Most interactive functionalities are not implemented, as it's not needed for the showcase
+    @Override
+    public Selectable getPartOn(int x, int y) {
+        return null;
+    }
+
+    @Override
+    public ProgramakerApi getApi() {
+        return null;
+    }
+
+    @Override
+    public SignalListenerManager getListenerManager() {
+        return null;
+    }
+
+    @Override
+    public SignalInputConnector getSignalInputConnectorOn(int x, int y) {
+        return null;
+    }
+
+    @Override
+    public BooleanInputConnector getBooleanInputConnectorOn(int x, int y) {
+        return null;
+    }
+
+    @Override
+    public AnyInputConnector getAnyInputConnectorOn(int x, int y) {
+        return null;
+    }
+
+    @Override
+    public StringInputConnector getStringInputConnectorOn(int xEnd, int yEnd) {
+        return null;
+    }
+
+    @Override
+    public ImageInputConnector getImageInputConnectorOn(int xEnd, int yEnd) {
+        return null;
+    }
+
+    @Override
+    public Tuple2<Integer, Integer> getCenteredOn() {
+        return center;
+    }
+    @Override
+
+    public void update() {
+
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/toolbox/PartsHolder.java

@@ -0,0 +1,214 @@
+package com.codigoparallevar.minicards.toolbox;
+
+import android.app.Dialog;
+import android.content.Context;
+import android.graphics.Color;
+import android.os.Build;
+import android.util.Log;
+import android.view.Gravity;
+import android.view.View;
+import android.widget.LinearLayout;
+import android.widget.ScrollView;
+import android.widget.TextView;
+
+import androidx.appcompat.app.AlertDialog;
+
+import com.codigoparallevar.minicards.CanvasView;
+import com.codigoparallevar.minicards.PartInstantiator;
+import com.codigoparallevar.minicards.parts.android.CameraStreamer;
+import com.codigoparallevar.minicards.parts.buttons.RoundButton;
+import com.codigoparallevar.minicards.parts.logic.Ticker;
+import com.codigoparallevar.minicards.parts.logic.Toggle;
+import com.codigoparallevar.minicards.parts.samples.ColorBox;
+import com.codigoparallevar.minicards.parts.strings.ConvertToString;
+import com.codigoparallevar.minicards.parts.viewers.ImageFrame;
+import com.codigoparallevar.minicards.types.Part;
+import com.codigoparallevar.minicards.types.functional.Consumer;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+import com.codigoparallevar.minicards.utils.Box;
+import com.programaker.api.data.ProgramakerBridgeInfo;
+import com.programaker.api.data.ProgramakerCustomBlock;
+import com.programaker.api.data.api_results.ProgramakerBridgeCustomBlockResult;
+
+import java.util.LinkedHashMap;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.Vector;
+
+public class PartsHolder {
+    private final Context context;
+
+    private final static List<Tuple2<String, PartInstantiator>> GuiParts =
+            new Vector<Tuple2<String, PartInstantiator>>(){{
+                add(new Tuple2<>("Round button", RoundButton.getInstantiator()));
+                add(new Tuple2<>("Red/Green box", ColorBox.getInstantiator()));
+                add(new Tuple2<>("Image frame", ImageFrame.getInstantiator()));
+            }};
+
+    private final static List<Tuple2<String, PartInstantiator>> AndroidParts =
+            new Vector<Tuple2<String, PartInstantiator>>(){{
+                add(new Tuple2<>("Camera", CameraStreamer.getInstantiator()));
+            }};
+
+    private final static List<Tuple2<String, PartInstantiator>> MiscParts =
+            new Vector<Tuple2<String, PartInstantiator>>(){{
+                add(new Tuple2<>("Ticker", Ticker.getInstantiator()));
+                add(new Tuple2<>("Toggle", Toggle.getInstantiator()));
+            }};
+
+    private final static List<Tuple2<String, PartInstantiator>> DebuggingParts =
+            new Vector<Tuple2<String, PartInstantiator>>(){{
+                add(new Tuple2<>("ToString", ConvertToString.getInstantiator()));
+            }};
+
+
+    private final List<PartCategory> Categories = new Vector<PartCategory>() {{
+        add(new PartCategory("GUI elements", GuiParts));
+        add(new PartCategory("Android", AndroidParts));
+        add(new PartCategory("Misc", MiscParts));
+        add(new PartCategory("Debugging", DebuggingParts));
+    }};
+
+    private Map<String, ProgramakerBridgeInfo> bridgeInfoMap;
+    private final static String LogTag = "PartsHolder";
+
+    public PartsHolder(Context context) {
+        this.context = context;
+    }
+
+    public void openAddPartModal(final CanvasView canvasView) {
+        AlertDialog.Builder builder = new AlertDialog.Builder(context);
+
+        // HACK : Nasty trick to make the accordion be able to close a dialog that still doesn't exist
+        Box<Dialog> openedDialog = new Box<>();
+        Consumer<Void> onComplete = _void -> {
+            if (openedDialog.get() == null) {
+                Log.e(LogTag, "Expected dialog to be opened already");
+            }
+            else {
+                openedDialog.get().cancel();
+            }
+        };
+
+        View categoryAccordion = generateCategoryAccordion(canvasView, onComplete);
+
+        builder.setTitle("Choose part")
+                .setView(categoryAccordion);
+
+        Dialog dialog = builder.create();
+        openedDialog.set(dialog);
+        dialog.show();
+    }
+
+    private View generateCategoryAccordion(final CanvasView canvasView, Consumer<Void> signalComplete) {
+        ScrollView view = new ScrollView(context);
+        LinearLayout layout = new LinearLayout(context);
+        layout.setOrientation(LinearLayout.VERTICAL);
+        layout.setDividerPadding(10);
+        layout.setShowDividers(LinearLayout.SHOW_DIVIDER_BEGINNING | LinearLayout.SHOW_DIVIDER_MIDDLE);
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+            layout.setDividerDrawable(context.getDrawable(android.R.drawable.divider_horizontal_bright));
+        }
+
+        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
+                LinearLayout.LayoutParams.MATCH_PARENT,
+                LinearLayout.LayoutParams.WRAP_CONTENT
+        );
+
+        for (int i = 0; i < Categories.size(); i++) {
+            PartCategory category = Categories.get(i);
+
+            LinearLayout categoryRow = new LinearLayout(context);
+            LinearLayout showcases = new LinearLayout(context);
+
+            TextView categoryName = new TextView(context); //Creating Button
+
+            // Add category name
+            categoryName.setId(i); //Setting Id for using in future
+            categoryName.setText(category.getName()); //Setting text
+            categoryName.setTextSize(15); //Text Size
+            categoryName.setPadding(50, 50, 50, 50); //padding
+            categoryName.setLayoutParams(params); //Setting Layout Params
+            categoryName.setTextColor(Color.parseColor("#000000")); //Text Color
+            categoryName.setBackgroundColor(Color.parseColor("#ffffff"));
+            categoryName.setGravity(Gravity.CENTER);
+            categoryName.setClickable(true);
+            categoryName.setOnClickListener(v -> {
+                if (showcases.getVisibility() == View.GONE) {
+                    showcases.setVisibility(View.VISIBLE);
+                }
+                else {
+                    showcases.setVisibility(View.GONE);
+                }
+            });
+
+            showcases.setVisibility(View.GONE);
+
+            showcases.setBackgroundColor(Color.parseColor("#BBBBBB"));
+            showcases.setOrientation(LinearLayout.VERTICAL);
+            showcases.setDividerPadding(10);
+            showcases.setShowDividers(LinearLayout.SHOW_DIVIDER_BEGINNING | LinearLayout.SHOW_DIVIDER_MIDDLE);
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+                showcases.setDividerDrawable(context.getDrawable(android.R.drawable.divider_horizontal_bright));
+            }
+
+            // Add showcases
+            int partHeights = 0;
+            for (Tuple2<String, PartInstantiator> entry : category.getParts()) {
+                PartShowcaseView showcase = new PartShowcaseView(context, entry.item2);
+
+                showcase.setClickable(true);
+                showcase.setOnClickListener(v -> {
+                    Part part = entry.item2.build(canvasView);
+                    canvasView.addPart(part);
+                    try {
+                        signalComplete.apply(null);
+                    } catch (Exception e) {
+                        e.printStackTrace();
+                    }
+                });
+                partHeights += showcase.getHeight();
+
+                showcases.addView(showcase);
+            }
+            showcases.setMinimumHeight(partHeights);
+
+            // Tie everything
+            categoryRow.setOrientation(LinearLayout.VERTICAL);
+            categoryRow.addView(categoryName);
+            showcases.setOrientation(LinearLayout.VERTICAL);
+            categoryRow.addView(showcases);
+
+            layout.addView(categoryRow);
+        }
+
+        view.addView(layout);
+        return view;
+    }
+
+    public void addCustomBlocks(List<ProgramakerBridgeInfo> bridgeInfo, List<ProgramakerBridgeCustomBlockResult> customBlocks) {
+        Map<String, ProgramakerBridgeInfo> bridgeInfoMap = new LinkedHashMap<>();
+        for (ProgramakerBridgeInfo info : bridgeInfo) {
+            bridgeInfoMap.put(info.getId(), info);
+        }
+
+        this.bridgeInfoMap = bridgeInfoMap;
+
+        for (ProgramakerBridgeCustomBlockResult res : customBlocks) {
+
+            List<Tuple2<String, PartInstantiator>> parts = new LinkedList<>();
+            for (ProgramakerCustomBlock block : res.getBlocks()) {
+                parts.add(new Tuple2<>(block.getMessage(), new ProgramakerCustomBlockInstantiator(block)));
+            }
+
+            if (bridgeInfoMap.containsKey(res.getBridge_id())) {
+                Categories.add(new PartCategory(bridgeInfoMap.get(res.getBridge_id()).getName(), parts));
+            }
+            else {
+                Categories.add(new PartCategory("Bridge ID="+res.getBridge_id(), parts));
+            }
+        }
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/toolbox/ProgramakerCustomBlockInstantiator.java

@@ -0,0 +1,22 @@
+package com.codigoparallevar.minicards.toolbox;
+
+import com.codigoparallevar.minicards.PartInstantiator;
+import com.codigoparallevar.minicards.parts.ProgramakerCustomBlockPart;
+import com.codigoparallevar.minicards.parts.buttons.RoundButton;
+import com.codigoparallevar.minicards.types.Part;
+import com.codigoparallevar.minicards.types.PartGrid;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+import com.programaker.api.data.ProgramakerCustomBlock;
+
+class ProgramakerCustomBlockInstantiator extends PartInstantiator {
+    private final ProgramakerCustomBlock _block;
+
+    public ProgramakerCustomBlockInstantiator(ProgramakerCustomBlock block) {
+        this._block = block;
+    }
+
+    @Override
+    protected Part instantiate(PartGrid grid, Tuple2<Integer, Integer> center) {
+        return new ProgramakerCustomBlockPart(grid, center, this._block);
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/types/Dropper.java

@@ -4,5 +4,5 @@ import com.codigoparallevar.minicards.types.connectors.Wiring.Wire;
 
 public interface Dropper<T extends Wire> {
     void drop(T wire);
-    void unlinkWire(T wire);
+    void wireUnlinked(T wire);
 }

app/src/main/java/com/codigoparallevar/minicards/types/Part.java

@@ -4,6 +4,7 @@ import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
 import com.codigoparallevar.minicards.types.connectors.output.OutputConnector;
 import com.codigoparallevar.minicards.types.wireData.WireDataType;
 
+import org.jetbrains.annotations.NotNull;
 import org.json.JSONException;
 import org.json.JSONObject;
 
@@ -20,6 +21,7 @@ public interface Part extends Selectable, Moveable, Drawable {
     List<InputConnector> getInputConnectors();
     List<OutputConnector> getOutputConnectors();
 
+    @NotNull
     JSONObject serialize() throws JSONException;
 
     void send(InputConnector inputConnector, WireDataType signal);
@@ -32,4 +34,6 @@ public interface Part extends Selectable, Moveable, Drawable {
 
     void resume();
     void pause();
+
+    Object query(Object lastValue);
 }

app/src/main/java/com/codigoparallevar/minicards/types/PartConnection.java

@@ -38,4 +38,17 @@ public class PartConnection {
 
         return serialized;
     }
+
+    public static JSONObject serializeToJson(final String inputConnectorId, final String inputPartId) {
+
+        JSONObject serialized = new JSONObject();
+        try {
+            serialized.put(PartConnection.INPUT_CONNECTOR_ID_KEY, inputConnectorId);
+            serialized.put(PartConnection.INPUT_PART_ID_KEY, inputPartId);
+        } catch (JSONException e) {
+            e.printStackTrace();
+        }
+
+        return serialized;
+    }
 }

app/src/main/java/com/codigoparallevar/minicards/types/PartGrid.java

@@ -1,18 +1,26 @@
 package com.codigoparallevar.minicards.types;
 
+import com.codigoparallevar.minicards.SignalListenerManager;
+import com.codigoparallevar.minicards.types.connectors.input.AnyInputConnector;
 import com.codigoparallevar.minicards.types.connectors.input.BooleanInputConnector;
+import com.codigoparallevar.minicards.types.connectors.input.ImageInputConnector;
 import com.codigoparallevar.minicards.types.connectors.input.SignalInputConnector;
 import com.codigoparallevar.minicards.types.connectors.input.StringInputConnector;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+import com.programaker.api.ProgramakerApi;
 
 public interface PartGrid {
     Selectable getPartOn(int x, int y);
+    ProgramakerApi getApi();
+    SignalListenerManager getListenerManager();
 
     SignalInputConnector getSignalInputConnectorOn(int x, int y);
     BooleanInputConnector getBooleanInputConnectorOn(int x, int y);
+    AnyInputConnector getAnyInputConnectorOn(int x, int y);
+    StringInputConnector getStringInputConnectorOn(int xEnd, int yEnd);
+    ImageInputConnector getImageInputConnectorOn(int xEnd, int yEnd);
 
     Tuple2<Integer,Integer> getCenteredOn();
 
     void update();
-
-    StringInputConnector getStringInputConnectorOn(int xEnd, int yEnd);
 }

app/src/main/java/com/codigoparallevar/minicards/types/Tuple2.java

@@ -1,11 +0,0 @@
-package com.codigoparallevar.minicards.types;
-
-public class Tuple2<T1, T2> {
-    public final T1 item1;
-    public final T2 item2;
-
-    public Tuple2(T1 item1, T2 item2) {
-        this.item1 = item1;
-        this.item2 = item2;
-    }
-}

app/src/main/java/com/codigoparallevar/minicards/types/connectors/RoundConnector.java

@@ -0,0 +1,7 @@
+package com.codigoparallevar.minicards.types.connectors;
+
+public interface RoundConnector {
+    int getX();
+    int getY();
+    float getRadius();
+}

app/src/main/java/com/codigoparallevar/minicards/types/connectors/Wiring/AnyWire.java

@@ -0,0 +1,19 @@
+package com.codigoparallevar.minicards.types.connectors.Wiring;
+
+import com.codigoparallevar.minicards.types.Drawable;
+import com.codigoparallevar.minicards.types.Moveable;
+import com.codigoparallevar.minicards.types.connectors.input.AnyInputConnector;
+import com.codigoparallevar.minicards.types.connectors.output.OutputConnector;
+import com.codigoparallevar.minicards.types.wireData.AnySignal;
+
+public class AnyWire extends Wire<AnySignal, AnyInputConnector> implements Moveable, Drawable {
+    public AnyWire(OutputConnector dropper, int xInit, int yInit) {
+        super(dropper, xInit, yInit);
+    }
+
+    public void send(AnySignal signal) {
+        if (_attachedTo != null) {
+            _attachedTo.send(signal);
+        }
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/types/connectors/Wiring/BooleanWire.java

@@ -1,13 +1,13 @@
 package com.codigoparallevar.minicards.types.connectors.Wiring;
 
 import com.codigoparallevar.minicards.types.Drawable;
-import com.codigoparallevar.minicards.types.Dropper;
 import com.codigoparallevar.minicards.types.Moveable;
 import com.codigoparallevar.minicards.types.connectors.input.BooleanInputConnector;
+import com.codigoparallevar.minicards.types.connectors.output.OutputConnector;
 import com.codigoparallevar.minicards.types.wireData.BooleanSignal;
 
 public class BooleanWire extends Wire<BooleanSignal, BooleanInputConnector> implements Moveable, Drawable {
-    public BooleanWire(Dropper dropper, int xInit, int yInit) {
+    public BooleanWire(OutputConnector dropper, int xInit, int yInit) {
         super(dropper, xInit, yInit);
     }
 

app/src/main/java/com/codigoparallevar/minicards/types/connectors/Wiring/ImageWire.java

@@ -0,0 +1,19 @@
+package com.codigoparallevar.minicards.types.connectors.Wiring;
+
+import com.codigoparallevar.minicards.types.Drawable;
+import com.codigoparallevar.minicards.types.Moveable;
+import com.codigoparallevar.minicards.types.connectors.input.ImageInputConnector;
+import com.codigoparallevar.minicards.types.connectors.output.OutputConnector;
+import com.codigoparallevar.minicards.types.wireData.ImageSignal;
+
+public class ImageWire extends Wire<ImageSignal, ImageInputConnector> implements Moveable, Drawable {
+    public ImageWire(OutputConnector dropper, int xInit, int yInit) {
+        super(dropper, xInit, yInit);
+    }
+
+    public void send(ImageSignal signal) {
+        if (_attachedTo != null) {
+            _attachedTo.send(signal);
+        }
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/types/connectors/Wiring/SignalWire.java

@@ -1,13 +1,13 @@
 package com.codigoparallevar.minicards.types.connectors.Wiring;
 
 import com.codigoparallevar.minicards.types.Drawable;
-import com.codigoparallevar.minicards.types.Dropper;
 import com.codigoparallevar.minicards.types.Moveable;
 import com.codigoparallevar.minicards.types.connectors.input.SignalInputConnector;
+import com.codigoparallevar.minicards.types.connectors.output.OutputConnector;
 import com.codigoparallevar.minicards.types.wireData.Signal;
 
 public class SignalWire extends Wire<Signal, SignalInputConnector> implements Moveable, Drawable {
-    public SignalWire(Dropper dropper, int xInit, int yInit) {
+    public SignalWire(OutputConnector dropper, int xInit, int yInit) {
         super(dropper, xInit, yInit);
     }
 

app/src/main/java/com/codigoparallevar/minicards/types/connectors/Wiring/StringWire.java

@@ -1,13 +1,13 @@
 package com.codigoparallevar.minicards.types.connectors.Wiring;
 
 import com.codigoparallevar.minicards.types.Drawable;
-import com.codigoparallevar.minicards.types.Dropper;
 import com.codigoparallevar.minicards.types.Moveable;
 import com.codigoparallevar.minicards.types.connectors.input.StringInputConnector;
+import com.codigoparallevar.minicards.types.connectors.output.OutputConnector;
 import com.codigoparallevar.minicards.types.wireData.StringSignal;
 
 public class StringWire extends Wire<StringSignal, StringInputConnector> implements Moveable, Drawable {
-    public StringWire(Dropper dropper, int xInit, int yInit) {
+    public StringWire(OutputConnector dropper, int xInit, int yInit) {
         super(dropper, xInit, yInit);
     }
 

app/src/main/java/com/codigoparallevar/minicards/types/connectors/Wiring/Wire.java

@@ -3,24 +3,31 @@ package com.codigoparallevar.minicards.types.connectors.Wiring;
 import android.graphics.Color;
 import android.graphics.Paint;
 import android.graphics.Path;
+import android.graphics.RectF;
 
 import com.codigoparallevar.minicards.ScrolledCanvas;
 import com.codigoparallevar.minicards.types.Drawable;
 import com.codigoparallevar.minicards.types.Dropper;
 import com.codigoparallevar.minicards.types.Moveable;
+import com.codigoparallevar.minicards.types.Selectable;
 import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
+import com.codigoparallevar.minicards.types.connectors.output.OutputConnector;
 import com.codigoparallevar.minicards.types.wireData.WireDataType;
 
 public class Wire<T extends WireDataType, InputConnectorType extends InputConnector<T, InputConnectorType>>
-        implements Moveable, Drawable {
+        implements Moveable, Drawable, Selectable {
+
+    private final double MAX_DISTANCE_TO_CONTAINS = 15;
 
     private final Dropper _dropper;
     private int _xinit;
     private int _yinit;
     private int _xend;
     private int _yend;
+    private Path path = null;
     private final static int _pathRunWay = 100;
     protected InputConnectorType _attachedTo = null;
+    protected OutputConnector _attachedFrom = null;
 
     public Wire(Dropper dropper, int xInit, int yInit) {
         _dropper = dropper;
@@ -34,12 +41,14 @@ public class Wire<T extends WireDataType, InputConnectorType extends InputConnec
     public void moveStart(int x, int y){
         _xinit = x;
         _yinit = y;
+        invalidatePath();
     }
 
     @Override
     public void moveEnd(int x, int y) {
         _xend = x;
         _yend = y;
+        invalidatePath(); // Invalidate current path
     }
 
     @Override
@@ -49,23 +58,17 @@ public class Wire<T extends WireDataType, InputConnectorType extends InputConnec
 
     @Override
     public void draw(ScrolledCanvas canvas, boolean devMode) {
-        final Path samplePath = new Path();
-
-        samplePath.moveTo(_xinit, _yinit);
-        samplePath.cubicTo(
-                _xinit + _pathRunWay, _yinit,
-                _xend - _pathRunWay, _yend,
-                _xend, _yend);
-
         Paint pathPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
-        pathPaint.setColor(Color.GREEN);
-        pathPaint.setStrokeWidth(5.0f);
+        pathPaint.setColor(Color.parseColor("#44FF44"));
+        pathPaint.setStrokeWidth(10.0f);
         pathPaint.setStrokeCap(Paint.Cap.ROUND);
         pathPaint.setStyle(Paint.Style.STROKE);
 
-        canvas.drawPath(samplePath, pathPaint);
+        canvas.drawPath(getPath(), pathPaint);
     }
 
+
+
     public int getXEnd() {
         return _xend;
     }
@@ -74,19 +77,101 @@ public class Wire<T extends WireDataType, InputConnectorType extends InputConnec
         return _yend;
     }
 
-    public void attachTo(InputConnectorType resultPoint) {
+    public void attachTo(InputConnectorType resultPoint, OutputConnector output) {
         _attachedTo = resultPoint;
+        _attachedFrom = output;
+
         _xend = resultPoint.getX();
         _yend = resultPoint.getY();
-        resultPoint.getAttachment(this);
+        resultPoint.addAttachment(this);
+
+        invalidatePath();
     }
 
     public InputConnector getAttachedTo() {
         return _attachedTo;
     }
 
+    @Override
+    public Moveable getMoveable() {
+        return null;
+    }
+
     public void unlink() {
-        _attachedTo = null;
-        _dropper.unlinkWire(this);
+        _attachedFrom.wireUnlinked(this);
+        _attachedTo.wireUnlinked(this);
+    }
+
+    public Object query(Object lastValue) {
+        return this._attachedFrom.query(lastValue);
+    }
+
+    private void invalidatePath() {
+        path = null;
+    }
+
+    private Path getPath() {
+        if (path == null) {
+            path = new Path();
+
+            // Bezier
+            path.moveTo(_xinit, _yinit);
+            path.cubicTo(
+                    _xinit, _yinit + _pathRunWay,
+                    _xend, _yend - _pathRunWay,
+                    _xend, _yend);
+        }
+        return path;
+    }
+
+    @Override
+    public boolean containsPoint(int x, int y) {
+        return distanceToPoint(x, y) < MAX_DISTANCE_TO_CONTAINS;
+    }
+
+    private double distanceToPoint(int x, int y) {
+        final int POINT_HALFSIDE = 25 / 2;
+        RectF rectangle = new RectF(x - POINT_HALFSIDE, y - POINT_HALFSIDE,
+                x + POINT_HALFSIDE, y + POINT_HALFSIDE);
+
+        double sqDist1 = squareDistanceToSegment(_xinit, _yinit,
+                _xinit, _yinit + _pathRunWay / 3,
+                x, y
+        );
+        double sqDist2 = squareDistanceToSegment(
+                _xinit, _yinit + _pathRunWay / 3,
+                _xend, _yend - _pathRunWay / 3,
+                x, y
+        );
+        double sqDist3 = squareDistanceToSegment(
+                _xend, _yend - _pathRunWay / 3,
+                _xend, _yend,
+                x, y
+        );
+
+        return Math.sqrt(Math.min(sqDist1, Math.min(sqDist2, sqDist3)));
+    }
+
+    private double squareDistanceToSegment(int vx, int vy, int wx, int wy, int px, int py) {
+        // Return minimum distance between line segment vw and point p
+        // i.e. |w-v|^2 -  avoid a sqrt
+        final double l2 = distance(vx, vy, wx, wy);
+        if (l2 == 0.0) return distance(vx, vy, px, py);   // v == w case
+        // Consider the line extending the segment, parameterized as v + t (w - v).
+        // We find projection of point p onto the line.
+        // It falls where t = [(p-v) . (w-v)] / |w-v|^2
+        // We clamp t from [0,1] to handle points outside the segment vw.
+
+        double pointInLine = ((px - vx) * (wx - vx) + (py - vy) * (wy - vy)) / l2;
+        pointInLine = Math.max(0, Math.min(1, pointInLine));
+
+        return distance(vx + pointInLine * (wx - vx),
+                vy + pointInLine * (wy - vy),
+                px, py
+        );
+    }
+
+    private double distance(double vx, double vy, double px, double py) {
+        return Math.pow(vx - px, 2) + Math.pow(vy - py, 2);
     }
 }

app/src/main/java/com/codigoparallevar/minicards/types/connectors/input/AnyInputConnector.java

@@ -1,6 +1,6 @@
 package com.codigoparallevar.minicards.types.connectors.input;
 
-import android.support.annotation.NonNull;
+import androidx.annotation.NonNull;
 
 import com.codigoparallevar.minicards.types.Moveable;
 import com.codigoparallevar.minicards.types.Part;
@@ -9,13 +9,13 @@ import com.codigoparallevar.minicards.types.connectors.output.BooleanOutputConne
 import com.codigoparallevar.minicards.types.connectors.output.OutputConnector;
 import com.codigoparallevar.minicards.types.connectors.output.SignalOutputConnector;
 import com.codigoparallevar.minicards.types.connectors.output.StringOutputConnector;
+import com.codigoparallevar.minicards.types.wireData.AnySignal;
 import com.codigoparallevar.minicards.types.wireData.BooleanSignal;
 import com.codigoparallevar.minicards.types.wireData.Signal;
 import com.codigoparallevar.minicards.types.wireData.StringSignal;
-import com.codigoparallevar.minicards.types.wireData.WireDataType;
 
 
-public abstract class AnyInputConnector implements InputConnector<WireDataType, AnyInputConnector> {
+public abstract class AnyInputConnector implements InputConnector<AnySignal, AnyInputConnector> {
 
     public SignalInputConnector ToSignalInputConnector() {
         return new WrapAsSignal(this);
@@ -51,7 +51,7 @@ public abstract class AnyInputConnector implements InputConnector<WireDataType,
 
         @Override
         public void send(Signal data) {
-            baseInputConnector.send(data);
+            baseInputConnector.send(new AnySignal(data.get()));
         }
     }
 
@@ -62,7 +62,7 @@ public abstract class AnyInputConnector implements InputConnector<WireDataType,
 
         @Override
         public void send(BooleanSignal data) {
-            baseInputConnector.send(data);
+            baseInputConnector.send(new AnySignal(data.get()));
         }
     }
 
@@ -73,7 +73,7 @@ public abstract class AnyInputConnector implements InputConnector<WireDataType,
 
         @Override
         public void send(StringSignal data) {
-            baseInputConnector.send(data);
+            baseInputConnector.send(new AnySignal(data.get()));
         }
     }
 
@@ -100,8 +100,8 @@ public abstract class AnyInputConnector implements InputConnector<WireDataType,
             baseInputConnector.drop(wire);
         }
 
-        public void unlinkWire(Wire wire) {
-            baseInputConnector.unlinkWire(wire);
+        public void wireUnlinked(Wire wire) {
+            baseInputConnector.wireUnlinked(wire);
         }
 
         public void updatePosition(int x, int y) {
@@ -124,8 +124,8 @@ public abstract class AnyInputConnector implements InputConnector<WireDataType,
             return baseInputConnector.getId();
         }
 
-        public void getAttachment(Wire wire) {
-            baseInputConnector.getAttachment(wire);
+        public void addAttachment(Wire wire) {
+            baseInputConnector.addAttachment(wire);
         }
     }
 }

app/src/main/java/com/codigoparallevar/minicards/types/connectors/input/ImageInputConnector.java

@@ -0,0 +1,6 @@
+package com.codigoparallevar.minicards.types.connectors.input;
+
+import com.codigoparallevar.minicards.types.wireData.ImageSignal;
+
+public interface ImageInputConnector extends InputConnector<ImageSignal, ImageInputConnector> {
+}

app/src/main/java/com/codigoparallevar/minicards/types/connectors/input/InputConnector.java

@@ -12,13 +12,16 @@ public interface InputConnector<T extends WireDataType, T1 extends InputConnecto
     void updatePosition(int x, int y);
 
     int getX();
+
     int getY();
 
-    void getAttachment(Wire<T, T1> wire);
+    void addAttachment(Wire<T, T1> wire);
 
     Part getPart();
 
     String getId();
 
     void send(T data);
+
+    void wireUnlinked(Wire wire);
 }

app/src/main/java/com/codigoparallevar/minicards/types/connectors/input/SignalInputConnector.java

@@ -1,5 +1,6 @@
 package com.codigoparallevar.minicards.types.connectors.input;
 
+import com.codigoparallevar.minicards.types.connectors.Wiring.SignalWire;
 import com.codigoparallevar.minicards.types.wireData.Signal;
 
 public interface SignalInputConnector extends InputConnector<Signal, SignalInputConnector> {

app/src/main/java/com/codigoparallevar/minicards/types/connectors/output/AnyOutputConnector.java

@@ -0,0 +1,8 @@
+package com.codigoparallevar.minicards.types.connectors.output;
+
+import com.codigoparallevar.minicards.types.connectors.Wiring.AnyWire;
+import com.codigoparallevar.minicards.types.connectors.input.AnyInputConnector;
+import com.codigoparallevar.minicards.types.wireData.AnySignal;
+
+public interface AnyOutputConnector extends OutputConnector<AnySignal, AnyInputConnector, AnyWire> {
+}

app/src/main/java/com/codigoparallevar/minicards/types/connectors/output/ImageOutputConnector.java

@@ -0,0 +1,11 @@
+package com.codigoparallevar.minicards.types.connectors.output;
+
+import com.codigoparallevar.minicards.types.connectors.Wiring.ImageWire;
+import com.codigoparallevar.minicards.types.connectors.input.ImageInputConnector;
+import com.codigoparallevar.minicards.types.wireData.ImageSignal;
+
+public interface ImageOutputConnector extends OutputConnector<
+        ImageSignal,
+        ImageInputConnector,
+        ImageWire> {
+}

app/src/main/java/com/codigoparallevar/minicards/types/connectors/output/OutputConnector.java

@@ -3,9 +3,9 @@ package com.codigoparallevar.minicards.types.connectors.output;
 import com.codigoparallevar.minicards.ScrolledCanvas;
 import com.codigoparallevar.minicards.types.Dropper;
 import com.codigoparallevar.minicards.types.Selectable;
-import com.codigoparallevar.minicards.types.Tuple2;
 import com.codigoparallevar.minicards.types.connectors.Wiring.Wire;
 import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
 import com.codigoparallevar.minicards.types.wireData.WireDataType;
 
 import java.util.List;
@@ -23,4 +23,10 @@ public interface OutputConnector<T extends WireDataType,
     void connectTo(T1 inputConnector);
 
     void send(T data);
+
+    Object query(Object lastValue);
+
+    List<T2> getWires();
+
+    void wireUnlinked(T2 wire);
 }

app/src/main/java/com/codigoparallevar/minicards/types/functional/Action.java

@@ -0,0 +1,5 @@
+package com.codigoparallevar.minicards.types.functional;
+
+public interface Action {
+    void run() throws InterruptedException;
+}

app/src/main/java/com/codigoparallevar/minicards/types/functional/Consumer.java

@@ -0,0 +1,5 @@
+package com.codigoparallevar.minicards.types.functional;
+
+public interface Consumer<T> {
+    void apply(T param) throws Exception;
+}

app/src/main/java/com/codigoparallevar/minicards/types/functional/Function.java

@@ -0,0 +1,5 @@
+package com.codigoparallevar.minicards.types.functional;
+
+public interface Function<T, U> {
+    U apply(T param) throws Exception;
+}

app/src/main/java/com/codigoparallevar/minicards/types/functional/Producer.java

@@ -0,0 +1,5 @@
+package com.codigoparallevar.minicards.types.functional;
+
+public interface Producer<T> {
+    T get();
+}

app/src/main/java/com/codigoparallevar/minicards/types/functional/Tuple2.java

@@ -0,0 +1,50 @@
+package com.codigoparallevar.minicards.types.functional;
+
+public class Tuple2<T1, T2> {
+    public final T1 item1;
+    public final T2 item2;
+
+    public Tuple2(T1 item1, T2 item2) {
+        this.item1 = item1;
+        this.item2 = item2;
+    }
+
+    @Override
+    public int hashCode() {
+        int hash1 = this.item1 == null ? 1 : this.item1.hashCode();
+        int hash2 = this.item2 == null ? 2 : this.item2.hashCode();
+
+        return hash1 ^ hash2;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (!(obj instanceof Tuple2)) {
+            return false;
+        }
+
+        Tuple2 other = (Tuple2) obj;
+        if (other.item1 == null) {
+            if (this.item1 != null) {
+                return false;
+            }
+        }
+        else {
+            if (!other.item1.equals(this.item1)) {
+                return false;
+            }
+        }
+
+        if (other.item2 == null) {
+            if (this.item2 != null) {
+                return false;
+            }
+        }
+        else {
+            if (!other.item2.equals(this.item2)) {
+                return false;
+            }
+        }
+        return true;
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/types/functional/Tuple3.java

@@ -0,0 +1,19 @@
+package com.codigoparallevar.minicards.types.functional;
+
+public class Tuple3<T, T1, T2> {
+
+    public final T _x;
+    public final T1 _y;
+    public final T2 _z;
+
+    public Tuple3(T x, T1 y, T2 z) {
+        _x = x;
+        _y = y;
+        _z = z;
+    }
+
+    @Override
+    public String toString(){
+        return "(" + _x + " - " + _y + ", " + _z + ")";
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/types/functional/Tuple4.java

@@ -1,4 +1,4 @@
-package com.codigoparallevar.minicards.types;
+package com.codigoparallevar.minicards.types.functional;
 
 public class Tuple4<T, T1, T2, T3> {
 

app/src/main/java/com/codigoparallevar/minicards/types/wireData/AnySignal.java

@@ -0,0 +1,14 @@
+package com.codigoparallevar.minicards.types.wireData;
+
+public class AnySignal implements WireDataType<Object> {
+    public final Object value;
+
+    public AnySignal(Object value) {
+        this.value = value;
+    }
+
+    @Override
+    public Object get() {
+        return value;
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/types/wireData/ImageSignal.java

@@ -0,0 +1,16 @@
+package com.codigoparallevar.minicards.types.wireData;
+
+import android.media.Image;
+
+public class ImageSignal implements WireDataType<Image> {
+    public final Image value;
+
+    public ImageSignal(Image value) {
+        this.value = value;
+    }
+
+    @Override
+    public Image get() {
+        return value;
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/ui_helpers/DoAsync.java

@@ -0,0 +1,27 @@
+package com.codigoparallevar.minicards.ui_helpers;
+
+import android.os.AsyncTask;
+import android.util.Log;
+
+import com.codigoparallevar.minicards.types.functional.Action;
+import com.codigoparallevar.minicards.types.functional.Consumer;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+
+public class DoAsync extends AsyncTask<Tuple2<Action, Consumer<Throwable>>,
+        Void, Void> {
+
+    @Override
+    protected Void doInBackground(Tuple2<Action, Consumer<Throwable>>... data) {
+        try {
+            data[0].item1.run();
+        }
+        catch (Throwable ex) {
+            try {
+                data[0].item2.apply(ex);
+            } catch (Throwable subEx) {
+                Log.e("DoAsync", "Error handling exception", subEx);
+            }
+        }
+        return null;
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/ui_helpers/GetAsync.java

@@ -0,0 +1,46 @@
+package com.codigoparallevar.minicards.ui_helpers;
+
+import android.os.AsyncTask;
+import android.util.Log;
+
+import com.codigoparallevar.minicards.types.functional.Consumer;
+import com.codigoparallevar.minicards.types.functional.Producer;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+import com.codigoparallevar.minicards.types.functional.Tuple3;
+
+public class GetAsync<T> extends AsyncTask<Tuple3<Producer<T>, Consumer<T>, Consumer<Throwable>>,
+        Void,
+        Tuple2<T, Consumer<T>>> {
+
+    @Override
+    protected Tuple2<T, Consumer<T>> doInBackground(Tuple3<Producer<T>, Consumer<T>, Consumer<Throwable>>... data) {
+        try {
+            T result = data[0]._x.get();
+            return new Tuple2<>(result, data[0]._y);
+        }
+        catch (Throwable ex) {
+            try {
+                data[0]._z.apply(ex);
+            }
+            catch (Throwable subEx) {
+                Log.d("GetAsync", "Error handling exception", subEx);
+            }
+            return null;
+        }
+    }
+
+    @Override
+    protected void onPostExecute(Tuple2<T, Consumer<T>> result) {
+        if (result == null) {
+            return;
+        }
+        else {
+            try {
+                result.item2.apply(result.item1);
+            }
+            catch (Throwable ex) {
+                Log.e("GetAsync", "Error on UI thread", ex);
+            }
+        }
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/utils/Box.java

@@ -0,0 +1,20 @@
+package com.codigoparallevar.minicards.utils;
+
+public class Box<T> {
+    private T val = null;
+
+    public Box() {
+    }
+
+    public Box(T val) {
+        this.val = val;
+    }
+
+    public T get() {
+        return val;
+    }
+
+    public void set(T val) {
+        this.val = val;
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/utils/Serializations.java

@@ -1,6 +1,10 @@
 package com.codigoparallevar.minicards.utils;
 
+import android.util.Log;
+
+import org.jetbrains.annotations.NotNull;
 import org.json.JSONArray;
+import org.json.JSONException;
 import org.json.JSONObject;
 
 import java.util.List;
@@ -8,6 +12,8 @@ import java.util.Map;
 
 public class Serializations {
 
+    private static final String LogTag = "Serialization";
+
     public static JSONArray serialize(List<Map<String,String>> data) {
         JSONArray array = new JSONArray();
         for (Map<String, String> dict : data) {
@@ -16,4 +22,68 @@ public class Serializations {
 
         return array;
     }
+
+    @NotNull
+    public static Object blindSerialize(Object obj) {
+        if (obj == null) {
+            return JSONObject.NULL;
+        }
+        // No serialization needed
+        else if (obj.getClass().isPrimitive() ||
+                obj instanceof String ||
+                obj instanceof JSONObject ||
+                obj instanceof JSONArray) {
+
+            return obj;
+        }
+
+        try {
+            return _blindSerialize(obj);
+        }
+        catch (Exception ex) {
+            Log.w(LogTag, "Error serialization: " + obj, ex);
+            return obj;
+        }
+    }
+
+    private static Object _blindSerialize(Object obj) throws JSONException {
+        if (obj instanceof Map) {
+            Map<?,?> objMap = (Map<?,?>) obj;
+
+            JSONObject map = new JSONObject();
+
+            for (Map.Entry<?,?> entry : objMap.entrySet()) {
+                map.put(entry.getKey().toString(), blindSerialize(entry.getValue()));
+            }
+
+            return map;
+        }
+        else if (obj instanceof Iterable) {
+            Iterable objIt = (Iterable) obj;
+
+            JSONArray arr = new JSONArray();
+            for (Object val : objIt) {
+                arr.put(blindSerialize(val));
+            }
+            return arr;
+        }
+        else {
+            // Unknown case
+            return obj;
+        }
+    }
+
+    public static String getString(JSONObject map, String key) {
+        if (!map.has(key)) {
+            return null;
+        }
+        if (map.opt(key) == JSONObject.NULL) {
+            return null;
+        }
+        try {
+            return map.getString(key);
+        } catch (JSONException e) {
+            return null;
+        }
+    }
 }

app/src/main/java/com/programaker/api/ProgramakerApi.kt

@@ -0,0 +1,421 @@
+package com.programaker.api
+
+import android.os.Build
+import android.util.Log
+import com.google.gson.Gson
+import com.google.gson.GsonBuilder
+import com.programaker.api.data.*
+import com.programaker.api.data.api_results.*
+import com.programaker.api.exceptions.ProgramakerLoginRequiredException
+import com.programaker.api.exceptions.ProgramakerProtocolException
+import com.programaker.api.exceptions.TokenNotFoundException
+import org.json.JSONArray
+import org.json.JSONObject
+import java.io.DataOutputStream
+import java.io.FileNotFoundException
+import java.io.InputStream
+import java.io.InputStreamReader
+import java.lang.reflect.Type
+import java.net.HttpURLConnection
+import java.net.URL
+import java.net.URLConnection
+
+
+class ProgramakerApi(private val ApiRoot: String="https://programaker.com/api") {
+    private val enumCallbackCache: MutableMap<String, List<ProgramakerCustomBlockArgumentValue>> = HashMap()
+    private val LogTag: String = "ProgramakerApi"
+
+    private var userId: String? = null
+    private var userName: String? = null
+    var token: String? = null
+
+    // API
+    fun check(): Boolean {
+        val conn = URL(getCheckUrl()).openConnection() as HttpURLConnection
+        if (conn == null){
+            Log.e(LogTag, "URL Connection not established, set to NULL")
+            return false
+        }
+        try {
+            addAuthHeader(conn)
+        } catch(ex: TokenNotFoundException) {
+            return false
+        }
+
+        val result: ProgramakerCheckResult
+        try {
+            result = parseJson(conn.inputStream, ProgramakerCheckResult::class.java)
+        } catch(ex: JsonParseException) {
+            ex.logError(LogTag)
+            return false
+        } catch (ex: FileNotFoundException) {
+            ex.logError(LogTag)
+            return false
+        }
+
+        if (result.success) {
+            this.userId = result.user_id;
+            this.userName = result.username;
+        }
+
+        return result.success
+    }
+
+
+    fun login(user: String, password: String): String {
+        val conn = URL(getLoginUrl()).openConnection() as HttpURLConnection
+        conn.setRequestProperty("Content-Type", "application/json")
+
+        conn.requestMethod = "POST";
+        conn.doOutput = true;
+
+        val postData = JSONObject()
+        postData.put("username", user)
+        postData.put("password", password)
+
+        val wr = DataOutputStream(conn.outputStream)
+        wr.writeBytes(postData.toString());
+        wr.flush();
+        wr.close();
+
+        val result: ProgramakerLoginResult
+        result = parseJson(conn.inputStream, ProgramakerLoginResult::class.java)
+        return result.token
+    }
+
+    fun fetchCustomBlocks(): List<ProgramakerBridgeCustomBlockResult> {
+        val conn = URL(getCustomBlocksUrl()).openConnection() as HttpURLConnection
+
+        addAuthHeader(conn)
+
+        val result: ProgramakerGetCustomBlocksResult
+
+        try {
+            val builder = GsonBuilder()
+            builder.registerTypeAdapter(ProgramakerGetCustomBlocksResult::class.java, ProgramakerGetCustomBlocksResultTypeAdapter())
+
+            val gson = builder.create()
+            val reader = InputStreamReader(conn.inputStream)
+
+            result = gson.fromJson(reader, ProgramakerGetCustomBlocksResult::class.java)
+        } catch(ex: JsonParseException) {
+            ex.logError(LogTag)
+            throw ProgramakerProtocolException()
+        } catch (ex: FileNotFoundException) {
+            ex.logError(LogTag)
+            throw ProgramakerProtocolException()
+        }
+        catch (ex: Exception) {
+            Log.e(LogTag, "Unexpected exception: " + ex, ex)
+            throw ProgramakerProtocolException()
+        }
+        return result.result
+    }
+
+    fun fetchConnectedBridges(): List<ProgramakerBridgeInfo> {
+        val conn = URL(getConnectedBridgesUrl()).openConnection() as HttpURLConnection
+
+        addAuthHeader(conn)
+
+        val result: ProgramakerGetBridgeInfoResult
+
+        try {
+            val builder = GsonBuilder()
+            builder.registerTypeAdapter(ProgramakerGetBridgeInfoResult::class.java, ProgramakerGetBridgeInfoTypeAdapter())
+
+            val gson = builder.create()
+            val reader = InputStreamReader(conn.inputStream)
+
+            result = gson.fromJson(reader, ProgramakerGetBridgeInfoResult::class.java)
+        } catch(ex: JsonParseException) {
+            ex.logError(LogTag)
+            throw ProgramakerProtocolException()
+        } catch (ex: FileNotFoundException) {
+            ex.logError(LogTag)
+            throw ProgramakerProtocolException()
+        }
+        return result.result
+    }
+
+    fun fetchAllowedValues(blockArg: ProgramakerCustomBlockArgument): List<ProgramakerCustomBlockArgumentValue>? {
+        val url = getArgumentValuesUrl(blockArg)
+        val cachedValues = cachedAllowedValues(url)
+        if (cachedValues != null) {
+            return cachedValues
+        }
+
+        val conn = URL(url).openConnection() as HttpURLConnection
+
+        addAuthHeader(conn)
+
+        var results: List<ProgramakerCustomBlockArgumentValue>? = null
+        try {
+            val serialized: HashMap<String,*> = parseJson(conn.inputStream, HashMap::class.java)
+            val returnInfo = ProgramakerCustomBlockArgumentValuesReturnInfo.deserialize(serialized)
+            if (!returnInfo.success) {
+                return null
+            }
+            results = returnInfo.values
+        } catch (ex: FileNotFoundException) {
+            ex.logError(LogTag)
+            return null
+        } catch(ex: Exception) {
+            Log.e(LogTag, ex.toString(), ex)
+            return null
+        }
+        cacheValues(url, results)
+        return results
+    }
+
+    fun callBlock(block: ProgramakerCustomBlock, arguments: List<String>): ProgramakerFunctionCallResult {
+        val conn = URL(getBlockUrl(block)).openConnection() as HttpURLConnection
+        conn.setRequestProperty("Content-Type", "application/json")
+        addAuthHeader(conn)
+
+        conn.requestMethod = "POST";
+        conn.doOutput = true;
+
+        val postData = JSONObject(hashMapOf(
+                "arguments" to JSONArray(arguments)
+        ) as Map<*, *>)
+
+        val wr = DataOutputStream(conn.outputStream)
+        wr.writeBytes(postData.toString());
+        wr.flush();
+        wr.close();
+
+        val result: ProgramakerFunctionCallResult
+        result = parseJson(conn.inputStream, ProgramakerFunctionCallResult::class.java)
+        return result
+    }
+
+    fun createBridge(name: String): String {
+        val conn = URL(getCreateBridgeUrl()).openConnection() as HttpURLConnection
+        conn.setRequestProperty("Content-Type", "application/json")
+        addAuthHeader(conn)
+
+        conn.requestMethod = "POST";
+        conn.doOutput = true;
+
+        val postData = JSONObject(hashMapOf(
+                "name" to name
+        ) as Map<*, *>)
+
+        val wr = DataOutputStream(conn.outputStream)
+        wr.writeBytes(postData.toString());
+        wr.flush();
+        wr.close();
+
+        val result: ProgramakerCreateBridgeResult
+        result = parseJson(conn.inputStream, ProgramakerCreateBridgeResult::class.java)
+        return result.getBridgeId()
+    }
+
+
+    fun createBridgeAuthenticationToken(bridgeId: String, tokenName: String): String {
+        val conn = URL(getCreateBridgeAuthenticationTokenUrl(bridgeId)).openConnection() as HttpURLConnection
+        conn.setRequestProperty("Content-Type", "application/json")
+        addAuthHeader(conn)
+
+        conn.requestMethod = "POST";
+        conn.doOutput = true;
+
+        val postData = JSONObject(hashMapOf(
+                "name" to tokenName
+        ) as Map<*, *>)
+
+        val wr = DataOutputStream(conn.outputStream)
+        wr.writeBytes(postData.toString());
+        wr.flush();
+        wr.close();
+
+        val result: ProgramakerFullBridgeInfo
+        result = parseJson(conn.inputStream, ProgramakerFullBridgeInfo::class.java)
+        return result.key
+    }
+
+    fun establishConnection(bridgeId: String): Boolean {
+        // NOTE: This establishes a connection to a bridge as long as it can be done without interaction
+
+        // Prepare connection
+        val prepareConn = URL(getPrepareConnectionUrl(bridgeId)).openConnection() as HttpURLConnection
+        addAuthHeader(prepareConn)
+
+        val prepareResult: ProgramakerPrepareConnectionResult
+        prepareResult = parseJson(prepareConn.inputStream, ProgramakerPrepareConnectionResult::class.java)
+        if (prepareResult.type != "direct") {
+            throw Exception("Expected 'direct' connection type, found '${prepareResult.type}'")
+        }
+
+        // Establish connection
+        val establishConn = URL(getEstablishConnectionUrl(bridgeId)).openConnection() as HttpURLConnection
+        establishConn.setRequestProperty("Content-Type", "application/json")
+        addAuthHeader(establishConn)
+
+        establishConn.requestMethod = "POST";
+        establishConn.doOutput = true;
+
+        val establishWrite = DataOutputStream(establishConn.outputStream)
+        establishWrite.writeBytes(JSONObject().toString());
+        establishWrite.flush();
+        establishWrite.close();
+
+        val establishResult: ProgramakerEstablishDirectConnectionResult
+        establishResult = parseJson(establishConn.inputStream, ProgramakerEstablishDirectConnectionResult::class.java)
+        return establishResult.success
+    }
+
+    // Initialization
+    init {
+        // Disable connection reuse if necessary
+        // HTTP connection reuse which was buggy pre-froyo
+        if (Build.VERSION.SDK.toInt() < Build.VERSION_CODES.FROYO) {
+            System.setProperty("http.keepAlive", "false")
+        }
+    }
+
+    fun openChannelTo(bridgeId: String, key: String,
+                      listener: ProgramakerSignalListener,
+                      onDisconnectCallback: Runnable): ProgramakerListeningChannel {
+        val channel = ProgramakerListeningChannel(
+                bridgeId, key,
+                this.token!!,
+                getListenSignalUrl(bridgeId, key),
+                listener, onDisconnectCallback)
+        channel.start()
+        return channel
+    }
+
+    // Private functions
+    private fun getCheckUrl(): String {
+        return "$ApiRoot/v0/sessions/check"
+    }
+
+    private fun getLoginUrl(): String {
+        return "$ApiRoot/v0/sessions/login"
+    }
+
+    private fun getCustomBlocksUrl(): String {
+        this.withUserName()
+        return "$ApiRoot/v0/users/$userName/custom-blocks/"
+    }
+
+    private fun getConnectedBridgesUrl(): String {
+        this.withUserName()
+        return "$ApiRoot/v0/users/$userName/bridges/"
+    }
+
+    private fun getBlockUrl(block: ProgramakerCustomBlock): String {
+        this.withUserId()
+        return "$ApiRoot/v0/users/id/$userId/bridges/id/${block.bridge_id}/functions/${block.function_name}"
+    }
+
+    private fun getCreateBridgeUrl(): String {
+        this.withUserName()
+        return "$ApiRoot/v0/users/$userName/bridges"
+    }
+
+    private fun getCreateBridgeAuthenticationTokenUrl(bridgeId: String): String {
+        this.withUserId()
+        return "$ApiRoot/v0/bridges/by-id/$bridgeId/tokens"
+    }
+
+    private fun getPrepareConnectionUrl(bridgeId: String): String {
+        this.withUserId()
+        return "$ApiRoot/v0/services/by-id/$bridgeId/how-to-enable"
+    }
+
+    private fun getEstablishConnectionUrl(bridgeId: String): String {
+        this.withUserName()
+        return "$ApiRoot/v0/users/$userName/services/id/$bridgeId/register"
+    }
+
+    private fun getListenSignalUrl(bridgeId: String, key: String): String {
+        this.withUserId()
+        return "$ApiRoot/v0/users/id/$userId/bridges/id/$bridgeId/signals/$key"
+    }
+
+    private fun getArgumentValuesUrl(blockArg: ProgramakerCustomBlockArgument): String {
+        this.withUserId()
+        return "$ApiRoot/v0/users/id/$userId/bridges/id/${blockArg.bridge_id}/callback/${blockArg.callback}"
+    }
+
+    fun getUserId(): String? {
+        this.withUserId()
+        return userId;
+    }
+
+    private fun withUserName() {
+        if (userName == null) {
+            if (token == null) {
+                throw ProgramakerLoginRequiredException()
+            }
+
+            this.check();
+            if (userName == null) {
+                throw ProgramakerProtocolException()
+            }
+        }
+    }
+
+    private fun withUserId() {
+        if (userId == null) {
+            if (token == null) {
+                throw ProgramakerLoginRequiredException()
+            }
+
+            this.check();
+            if (userId == null) {
+                throw ProgramakerProtocolException()
+            }
+        }
+    }
+
+    private fun addAuthHeader(conn: URLConnection) {
+        if (token != null) {
+            conn.setRequestProperty("Authorization", token)
+        }
+        else {
+            throw TokenNotFoundException()
+        }
+    }
+
+    // Simple result caching
+    private fun cacheValues(url: String, results: List<ProgramakerCustomBlockArgumentValue>) {
+        enumCallbackCache[url] = results
+    }
+
+    private fun cachedAllowedValues(url: String): List<ProgramakerCustomBlockArgumentValue>? {
+        if (enumCallbackCache.containsKey(url)) {
+            return enumCallbackCache[url]
+        }
+        return null
+    }
+
+    fun hasCachedAllowedValues(blockArg: ProgramakerCustomBlockArgument): Boolean {
+        if (userId == null) {
+            // This will be required to fully form the URL.
+            // Also, without it, it's not possible to have cached values. We can safely discard it
+            return false
+        }
+        val url = getArgumentValuesUrl(blockArg)
+        return enumCallbackCache.containsKey(url)
+    }
+
+    // Utils
+    private fun <T>parseJson(content: InputStream, resultClass: Type): T {
+        val reader = InputStreamReader(content)
+        val gson = Gson()
+        return gson.fromJson(reader, resultClass)
+    }
+}
+
+private fun FileNotFoundException.logError(tag: String) {
+    Log.e(tag, "Cannot open: ${this.message}")
+}
+
+class JsonParseException(private val content: String, private val cls: Type) : Exception() {
+    fun logError(tag: String) {
+        Log.e(tag, "Cannot JSON parse: ${this.content} as ${this.cls}", this)
+    }
+}

app/src/main/java/com/programaker/api/ProgramakerListeningChannel.kt

@@ -0,0 +1,78 @@
+package com.programaker.api
+
+import android.util.Log
+import com.google.gson.Gson
+import okhttp3.*
+import okio.ByteString
+import org.json.JSONException
+import java.nio.charset.Charset
+import java.util.concurrent.TimeUnit
+
+class ProgramakerListeningChannel(
+        private val bridgeId: String,
+        private val key: String,
+        private val token: String,
+        private val url: String,
+        private val listener: ProgramakerSignalListener,
+        private var onDisconnect: Runnable
+): WebSocketListener() {
+    private var webSocket: WebSocket? = null
+    private val utf8: Charset = Charset.forName("UTF-8")
+    private val gson = Gson()
+
+    private val LogTag: String = "PM-ListeningChannel"
+    private val PING_PERIOD_MILLIS: Long = 15000 // 15seconds
+
+    fun start() {
+        val client: OkHttpClient = OkHttpClient.Builder()
+                .pingInterval(PING_PERIOD_MILLIS, TimeUnit.MILLISECONDS)
+                .readTimeout(0, TimeUnit.MILLISECONDS)
+                .build()
+
+        val request: Request = Request.Builder()
+                .url(url)
+                .addHeader("Authorization", token)
+                .build()
+        client.newWebSocket(request, this)
+
+        // Trigger shutdown of the dispatcher's executor so this process can exit cleanly.
+        client.dispatcher.executorService.shutdown()
+    }
+
+    // Websocket management
+    override fun onOpen(webSocket: WebSocket, response: Response) {
+        this.webSocket = webSocket
+    }
+
+    override fun onMessage(webSocket: WebSocket, bytes: ByteString) {
+        onMessage(webSocket, bytes.string(utf8))
+    }
+
+    override fun onMessage(webSocket: WebSocket, text: String) {
+        Log.d(LogTag, "Message: $text")
+        val json = gson.fromJson(text, HashMap::class.java)
+        if (json == null) {
+            this.onFailure(webSocket, JSONException("Error decoding: $text"), null)
+        }
+        else {
+            this.listener.onNewSignal(bridgeId, key, json)
+        }
+    }
+
+    override fun onClosing(webSocket: WebSocket, code: Int, reason: String) {
+        webSocket.close(1000, null)
+        Log.i(LogTag, "Closing bridge socket {code=$code, reason=$reason}")
+        onDisconnect.run()
+    }
+
+    override fun onFailure(webSocket: WebSocket, t: Throwable, response: Response?) {
+        Log.e(LogTag, "Error: $t", t)
+        onDisconnect.run()
+    }
+
+    fun stop() {
+        onDisconnect = Runnable {  } // Skip disconnection procedure
+        webSocket?.close(1000, null)
+        webSocket = null
+    }
+}

app/src/main/java/com/programaker/api/ProgramakerSignalListener.kt

@@ -0,0 +1,7 @@
+package com.programaker.api
+
+import java.util.HashMap
+
+interface ProgramakerSignalListener {
+    fun onNewSignal(bridgeId: String, key: String, signal: HashMap<*, *>)
+}

app/src/main/java/com/programaker/api/data/ProgramakerBridgeInfo.kt

@@ -0,0 +1,9 @@
+package com.programaker.api.data
+
+class ProgramakerBridgeInfo (
+   val id: String,
+   val name: String
+   // val is_connected: boolean
+   // val icon: Map<String, Object>
+) {
+}

app/src/main/java/com/programaker/api/data/ProgramakerCustomBlock.kt

@@ -0,0 +1,73 @@
+package com.programaker.api.data
+
+import org.json.JSONArray
+import org.json.JSONObject
+
+class ProgramakerCustomBlock(
+        val block_id: String,
+        val function_name: String,
+        val message: String,
+        val arguments: List<ProgramakerCustomBlockArgument>?,
+        val block_type: String?,
+        val block_result_type: String?,
+        var bridge_id: String?,
+        val save_to: ProgramakerCustomBlockSaveTo?,
+        var key: String?,
+        val subkey: ProgramakerCustomBlockSubkeyDefinition?
+) {
+    fun serialize(): JSONObject {
+
+        val serializedArguments = JSONArray()
+        if (arguments != null) {
+            for (value in arguments) {
+                serializedArguments.put(value.serialize())
+            }
+        }
+
+        var saveToSerialized: JSONObject? = null
+        if (save_to != null) {
+            saveToSerialized = save_to.serialize()
+        }
+
+        val serialized = hashMapOf(
+                "block_id" to block_id,
+                "function_name" to function_name,
+                "message" to message,
+                "arguments" to serializedArguments,
+                "block_type" to block_type,
+                "bridge_id" to bridge_id,
+                "save_to" to saveToSerialized
+        )
+
+        if (key != null) {
+            serialized.put("key", key)
+            serialized.put("subkey", subkey?.serialize())
+        }
+        if (block_result_type != null || key == null) {
+            serialized.put("block_result_type", block_result_type)
+        }
+
+        return JSONObject(serialized as Map<*, *>)
+    }
+    companion object {
+        @JvmStatic
+        fun deserialize(obj: JSONObject): ProgramakerCustomBlock {
+            var block = ProgramakerCustomBlock(
+                    obj.getString("block_id"),
+                    obj.getString("function_name"),
+                    obj.getString("message"),
+                    ProgramakerCustomBlockArgument.deserialize(obj.optJSONArray("arguments")),
+                    obj.getString("block_type"),
+                    obj.optString("block_result_type"),
+                    obj.optString("bridge_id"),
+                    ProgramakerCustomBlockSaveTo.deserialize(obj.optJSONObject("save_to")),
+                    obj.optString("key"),
+                    ProgramakerCustomBlockSubkeyDefinition.deserialize(obj.optJSONObject("subkey"))
+            )
+
+            return block
+        }
+    }
+
+}
+

app/src/main/java/com/programaker/api/data/ProgramakerCustomBlockArgument.kt

@@ -0,0 +1,73 @@
+package com.programaker.api.data
+
+import android.util.Log
+import org.json.JSONArray
+import org.json.JSONObject
+import java.util.*
+
+class ProgramakerCustomBlockArgument(
+        val type: String?,
+        val default_value: String?,
+        // val class: String,
+        val callback: String?
+) {
+    var bridge_id: String? = null
+
+    fun serialize():  JSONObject {
+        val serialized = hashMapOf<String, String?>(
+                "type" to type,
+                "default_value" to default_value,
+                "callback" to callback,
+                "bridge_id" to bridge_id
+        )
+
+        return JSONObject(serialized as Map<*, *>)
+    }
+
+    fun getComputedType(): String? {
+        if (callback != null && callback != "null") {
+            return "ENUM";
+        }
+        else {
+            return type;
+        }
+    }
+
+    companion object {
+        @JvmStatic
+        fun deserialize(arguments: JSONArray?): List<ProgramakerCustomBlockArgument> {
+            if (arguments == null) {
+                return listOf();
+            }
+            val results: MutableList<ProgramakerCustomBlockArgument> = LinkedList()
+
+            var i = 0;
+            while (i < arguments.length()) {
+                val obj = arguments.getJSONObject(i)
+                if (obj == null) {
+                    Log.e("PMCustomBlockArgument", "Looped into a null value!?")
+                }
+                else {
+                    results.add(deserialize(obj))
+                }
+
+                i += 1;
+            }
+
+            return results
+        }
+
+        @JvmStatic
+        fun deserialize(arguments: JSONObject): ProgramakerCustomBlockArgument {
+            val type: String? = arguments.optString("type")
+            val default_value: String? = arguments.optString("default_value")
+            val callback: String? = arguments.optString("callback")
+            val bridge_id: String? = arguments.optString("bridge_id")
+
+            val arg = ProgramakerCustomBlockArgument(type, default_value, callback)
+            arg.bridge_id = bridge_id
+            return arg
+        }
+    }
+
+}

app/src/main/java/com/programaker/api/data/ProgramakerCustomBlockArgumentValue.kt

@@ -0,0 +1,67 @@
+package com.programaker.api.data
+
+import com.programaker.api.optGet
+import java.util.*
+
+class ProgramakerCustomBlockArgumentValue (
+        val id: String,
+        val name: String
+) {
+    companion object {
+        @JvmStatic
+        fun deserializeList(value: Object): List<ProgramakerCustomBlockArgumentValue> {
+            if (value is Map<*, *>) {
+                return deserialize(value as Map<*, *>)
+            } else if (value is List<*>) {
+                return deserialize(value as List<*>)
+            } else {
+                throw IllegalArgumentException("Error deserializing: $value")
+            }
+        }
+
+        @JvmStatic
+        fun deserialize(value: Map<*, *>): List<ProgramakerCustomBlockArgumentValue> {
+            val results = LinkedList<ProgramakerCustomBlockArgumentValue>()
+            for (entry in value.asIterable()) {
+                var value = entry.value.toString()
+                if (entry.value is Map<*, *>) {
+                    if ((entry.value as Map<String, *>).containsKey("name")) {
+                        value = (entry.value as Map<*, *>)["name"].toString()
+                    }
+                }
+
+                results.add(ProgramakerCustomBlockArgumentValue(entry.key.toString(), value))
+            }
+
+            return results
+        }
+
+        @JvmStatic
+        fun deserialize(value: List<*>): List<ProgramakerCustomBlockArgumentValue> {
+            val results = LinkedList<ProgramakerCustomBlockArgumentValue>()
+            for (entry in value) {
+                if (entry is Map<*,*>) {
+                    var name = (entry as Map<String, *>).optGet("name")
+                    var id = (entry as Map<String, *>).optGet("id")
+                    
+                    if (name == null && id == null) {
+                        throw IllegalArgumentException("Error deserializing: $entry")
+                    }
+                    else if (name == null) {
+                        name = id
+                    }
+                    else if (id == null) {
+                        id = name
+                    }
+
+                    results.add(ProgramakerCustomBlockArgumentValue(id.toString(), name.toString()))
+                }
+                else {
+                    throw IllegalArgumentException("Error deserializing: $entry")
+                }
+            }
+
+            return results
+        }
+    }
+}

app/src/main/java/com/programaker/api/data/ProgramakerCustomBlockArgumentValuesReturnInfo.kt

@@ -0,0 +1,29 @@
+package com.programaker.api.data
+
+import com.programaker.api.optGet
+import java.util.*
+
+class ProgramakerCustomBlockArgumentValuesReturnInfo(
+        val success: Boolean,
+        val values: List<ProgramakerCustomBlockArgumentValue>
+) {
+    companion object {
+        @JvmStatic
+        fun deserialize(value: HashMap<String,*>): ProgramakerCustomBlockArgumentValuesReturnInfo {
+            val _success: Boolean? = value.optGet("success") as Boolean?
+            val _result: Object? = value.optGet("result") as Object
+
+            var success = false
+            if (_success != null) {
+                success = _success
+            }
+
+            var result: List<ProgramakerCustomBlockArgumentValue> = Collections.emptyList<ProgramakerCustomBlockArgumentValue>()
+            if (_result != null) {
+                result = ProgramakerCustomBlockArgumentValue.deserializeList(_result)
+            }
+
+            return ProgramakerCustomBlockArgumentValuesReturnInfo(success, result)
+        }
+    }
+}

app/src/main/java/com/programaker/api/data/ProgramakerCustomBlockSaveTo.kt

@@ -0,0 +1,27 @@
+package com.programaker.api.data
+
+import org.json.JSONObject
+
+class ProgramakerCustomBlockSaveTo (
+        val type: String,
+        val index: Int
+) {
+    fun serialize(): JSONObject {
+        return JSONObject(hashMapOf(
+                "type" to type,
+                "index" to index
+        ) as Map<*, *>)
+    }
+
+    companion object {
+        @JvmStatic
+        fun deserialize(save_to: JSONObject?): ProgramakerCustomBlockSaveTo? {
+            if (save_to == null) {
+                return null;
+            }
+
+            return ProgramakerCustomBlockSaveTo(save_to.getString("type"),
+                    save_to.getInt("index"))
+        }
+    }
+}

app/src/main/java/com/programaker/api/data/ProgramakerCustomBlockSubkeyDefinition.kt

@@ -0,0 +1,29 @@
+package com.programaker.api.data
+
+import org.json.JSONObject
+
+class ProgramakerCustomBlockSubkeyDefinition(
+        val type: String,
+        val value: String
+) {
+    fun serialize(): JSONObject {
+        return JSONObject(hashMapOf(
+                "type" to type,
+                "value" to value
+        ) as Map<*, *>)
+    }
+
+    companion object {
+        @JvmStatic
+        fun deserialize(subkey: JSONObject?): ProgramakerCustomBlockSubkeyDefinition? {
+            if (subkey == null) {
+                return null;
+            }
+
+            return ProgramakerCustomBlockSubkeyDefinition(
+                    subkey.getString("type"),
+                    subkey.getString("value"))
+        }
+    }
+
+}

app/src/main/java/com/programaker/api/data/ProgramakerFunctionCallResult.kt

@@ -0,0 +1,10 @@
+package com.programaker.api.data
+
+import java.util.*
+
+class ProgramakerFunctionCallResult (
+        var success: Boolean,
+        var result: Object
+) {
+
+}

app/src/main/java/com/programaker/api/data/api_results/ProgramakerBridgeCustomBlockResult.kt

@@ -0,0 +1,6 @@
+package com.programaker.api.data.api_results
+
+import com.programaker.api.data.ProgramakerCustomBlock
+
+class ProgramakerBridgeCustomBlockResult(val bridge_id: String, val blocks: List<ProgramakerCustomBlock>) {
+}

app/src/main/java/com/programaker/api/data/api_results/ProgramakerCheckResult.kt

@@ -0,0 +1,4 @@
+package com.programaker.api.data.api_results
+
+class ProgramakerCheckResult(val success: Boolean, val user_id: String, val username: String) {
+}

app/src/main/java/com/programaker/api/data/api_results/ProgramakerCreateBridgeResult.kt

@@ -0,0 +1,17 @@
+package com.programaker.api.data.api_results
+
+class ProgramakerCreateBridgeResult (
+        val control_url: String
+) {
+    fun getBridgeId(): String {
+        val url = control_url.trim('/');
+        if (url.endsWith("communication")) {
+            val no_communication = url.substring(0, url.length - "communication".length);
+            val chunks = no_communication.trim('/').split("/");
+            return chunks[chunks.size - 1]
+        }
+        else {
+            throw IllegalArgumentException("Unknown control_url format")
+        }
+    }
+}

app/src/main/java/com/programaker/api/data/api_results/ProgramakerEstablishDirectConnectionResult.kt

@@ -0,0 +1,5 @@
+package com.programaker.api.data.api_results
+
+class ProgramakerEstablishDirectConnectionResult(val success: Boolean) {
+
+}